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          <link:loc xlink:type="locator" xlink:href="cmcm-20251231.xsd#cmcm_AiRelatedEquipmentMember" xlink:label="cmcm_AiRelatedEquipmentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="cmcm-20251231.xsd#cmcm_ReceivablesImpairmentCharges" xlink:label="cmcm_ReceivablesImpairmentCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract"/>
          <link:loc xlink:type="locator" xlink:href="cmcm-20251231.xsd#cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember" xlink:label="srt_AffiliatedEntityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransferredAtPointInTimeMember" xlink:label="us-gaap_TransferredAtPointInTimeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
          <link:loc xlink:type="locator" xlink:href="cmcm-20251231.xsd#cmcm_DreamAheadPteLtdMember" xlink:label="cmcm_DreamAheadPteLtdMember"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GovernmentSubsidiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government subsidies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GovernmentSubsidiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Government subsidies, [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GovernmentSubsidiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for government subsidies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement of amounts due from Beijing Orionstar Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Consideration Transferred Settlement Of Amount Due To Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination consideration transferred settlement of amount due to acquiree.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Liveme Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Live.me.Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Live. me.Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Live. me.Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vested (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-PRC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Foreign</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Profit earned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SummaryOfSignificantOfAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant of Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SummaryOfSignificantOfAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of Significant of Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherLiabilitiesNoncurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of other non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherLiabilitiesNoncurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Noncurrent [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherLiabilitiesNoncurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other liabilities noncurrent table text block.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at the beginning of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at the end of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of material related party transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transactions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Assets Acquired And Liabilities Assumed Accounts Payable Accrued Expenses And Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination assets acquired and liabilities assumed accounts payable, accrued expenses and other current liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination assets acquired and liabilities assumed accounts payable, accrued expenses and other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhuhai Hainiao Technology Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhuhai Hainiao Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhuhai Hainiao Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign statutory tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Foreign Statutory Tax Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the statutory corporate income tax rate in the foreign jurisdiction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Status For Taxability [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Status For Taxability [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to various tax status.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash investing and financing activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestrictedSharesWithOptionFeatureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted shares with an option feature</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestrictedSharesWithOptionFeatureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Shares With Option Feature [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestrictedSharesWithOptionFeatureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents restricted shares with option feature in a share-based compensation plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), before Reclassifications, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income/(loss) before reclassification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_JP_lbl" xlink:role="http://www.xbrl.org/2003/role/label">JAPAN</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_JP_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Japan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AntutuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Antutu</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AntutuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antutu [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AntutuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Antutu.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating income and expenses (a)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExerciseMultiple_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected exercise multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExerciseMultiple_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Exercise Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExerciseMultiple_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The measurement of exercise multiple used as an input to measure fair value of the option.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Other Observable Inputs (Level 2)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LongTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Investments [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LongTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Long Term Investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LongTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares, shares authorized</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts receivable, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercised (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Exercised In Period Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average price of awards other than options that were either exercised during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value by Liability Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value by Liability Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202309Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2023-09 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202309Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2023-09</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SaleAndRentalOfRoboticProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale and Rental of Robotic Products [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SaleAndRentalOfRoboticProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale and Rental of Robotic Products.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SaleAndRentalOfRoboticProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale and rental of robotic products</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment reporting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Consideration Transferred and Preacquisition Equity Interest in Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfGeneralReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold percentage of general reserve required to be maintained threshold percentage of general reserve required to be maintained</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfGeneralReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Threshold Percentage Of General Reserve Required To Be Maintained</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfGeneralReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the threshold percentage of general reserve required to be maintained in accordance with the PRC Regulations on Enterprises with Foreign Investment and their articles of association.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Financial Information Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FirstTwoMillionOfProfitEarnedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">First Two Million of Profit Earned [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FirstTwoMillionOfProfitEarnedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Two Million of Profit Earned [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FirstTwoMillionOfProfitEarnedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First HK$2 Million of Profits Earned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board of Directors Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans and Interest Received From [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans and interest received from.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans and interest received from</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PayableToOnlineAdvertisingPlatformsAsAgency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable to online advertising platforms as agency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PayableToOnlineAdvertisingPlatformsAsAgency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable To Online Advertising Platforms As Agency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PayableToOnlineAdvertisingPlatformsAsAgency_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount due to online advertising platforms as an agency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SharesConversionRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion ratio, ADS to Class A ordinary share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SharesConversionRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Conversion Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SharesConversionRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion ratio of American Depositary Share (ADS) to Class A ordinary share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions based on tax positions related to current year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating income (loss):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of equity interest held directly and indirectly</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of equity interest held on acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Equity Interest Held On Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of equity interest held on acquisition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value per option granted (US$)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross unrealized losses (downward adjustment and impairment)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Businesses, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at the beginning of the year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at the end of the year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Outstanding Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average per share amount at which grantees can acquire shares of common stock share based compensation plan outstanding at reporting date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from maturity of short-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Maturities, Prepayments and Calls of Short-Term Investments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromForeignCurrencyTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unrecognized tax benefits, increase (decrease) resulting from foreign currency translation.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToRevenuesAndGainsRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination expected revenues</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToRevenuesAndGainsRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination separately recognized transactions expected to revenues and gains recognized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities, mezzanine equity and shareholder's equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Motor vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vehicles [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation, expiration of net operating losses, amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration of net operating losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payables and Accruals [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PixiuGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pixiu Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PixiuGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pixiu Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PixiuGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pixiu Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign currency translation adjustments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decreases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid Expenses and Other Current Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expenses and Other Current Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Exercisable Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercisable | shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of awards other than share options (fully vested and expected to vest) that may be exercised as of the balance sheet date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity interest acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Voting Equity Interest Acquired, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cheetah Mobile Hong Kong</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cheetah Mobile Hong Kong Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cheetah Mobile Hong Kong Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentDeficitInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment deficit in subsidiaries</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentDeficitInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment deficit in subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel">Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel">Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Valuation allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation allowances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Valuation Allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">PRC statutory income tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AcquisitionOfPropertyIncludedInAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition of property and equipment and intangible assets included in accrued expenses and other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AcquisitionOfPropertyIncludedInAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition Of Property Included In Accrued Expenses And Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AcquisitionOfPropertyIncludedInAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non cash activity of acquiring property and equipment and intangible assets consideration included in accrued expenses and other current liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-deductible expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Third Party Engaged [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfConvertibleLoanProvidedToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement of convertible loan provided to Beijing Orionstar</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfConvertibleLoanProvidedToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Consideration Transferred Settlement Of Convertible Loan Provided To Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationConsiderationTransferredSettlementOfConvertibleLoanProvidedToAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination consideration transferred settlement of convertible loan provided to acquiree.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Goodwill, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Percent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax (benefits) expenses, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EarningsPerAds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Losses per ADS (1 ADS represent 50 Class A ordinary share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EarningsPerAds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">n/a</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EarningsPerAds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnings (loss) per ADS (1 ADS represent 10 Class A ordinary share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Jurisdiction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt securities available for sale Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Available-for-sale debt securities under fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Numerator:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Noncurrent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfVariableInterestEntitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Variable Interest Entities [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RecordedUnconditionalPurchaseObligationsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Summary Of Commitment For Cloud Services</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ProceedFromDisposalOfSubsidiariesNetOfCashBalanceAtDisposedEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceed from disposal of subsidiaries, net of cash balance at disposed entities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardOfSubsidiariesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of assumptions used for grant date fair value under binomial tree option pricing model</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance as of January 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Expiration Of Net Operating Losses, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation, expiration of net operating losses, percent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration of net operating losses, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Exemption Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exemption period for income tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the tax exemption period for income tax rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnicalAIApplicationServicesAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Technical, AI application services and others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnicalAIApplicationServicesAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Technical AI Application Services And Others [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnicalAIApplicationServicesAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Technical, AI application services and others.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ForeignCurrencyExchangeGainLossNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Exchange, Gain (Loss), Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ForeignCurrencyExchangeGainLossNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Foreign Currency Exchange, Gain (Loss), Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ForeignCurrencyExchangeGainLossNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Foreign currency exchange losses (gains)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReclassification_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Reclassification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReclassification_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value measurement with unobservable inputs reconciliation recurring basis asset reclassification.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReclassification_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite Lived Intangible Asset useful life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Useful Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockRedemptionAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Redeemable preferred shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockRedemptionAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Redemption Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PaymentsToAcquirePropertyPlantAndEquipmentAndIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property, plant and equipment and intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PaymentsToAcquirePropertyPlantAndEquipmentAndIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property Plant and Equipment and Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PaymentsToAcquirePropertyPlantAndEquipmentAndIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments to acquire property plant and equipment and intangible assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of computation of basic and diluted Loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MulticloudManagementServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Multi-cloud Management Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MulticloudManagementServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MultiCloud Management Services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MulticloudManagementServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Multi-cloud management services.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Losses per share-basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Earnings (Loss) per share-basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Revenue Disaggregated by Revenue Source</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Live.me [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Live Me.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LiveMeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Live Me [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherNonoperatingIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherNonoperatingIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other Nonoperating Income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GamingAndUtilityRelatedbusinessesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gaming And Utility RelatedBusinesses [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Benefit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentShellCompanyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Shell Company Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentShellCompanyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Shell Company Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligationFiscalYearMaturityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Obligation, Fiscal Year Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongkongCheetahMobileTechnologyLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hongkong Cheetah Mobile Technology Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongkongCheetahMobileTechnologyLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hongkong Cheetah Mobile Technology Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongkongCheetahMobileTechnologyLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hongkong Cheetah Mobile Technology Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Entity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest (expense) income, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest income, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income (Expense), Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Income (Expense), Nonoperating, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities of the VIEs and VIE's subsidiaries without recourse to the Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftJapanIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Kingsoft Japan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftJapanIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Japan Kingsoft</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftJapanIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kingsoft Japan Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftJapanIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents Kingsoft Japan Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccountReceivableRelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Account Receivable Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccountReceivableRelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Account receivable related party.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash from operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues from External Customers and Long-Lived Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues from External Customers and Long-Lived Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kingsoft Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Kingsoft Group.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_KingsoftGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Kingsoft Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due from related parties, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivable, after Allowance for Credit Loss, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Receivable, after Allowance for Credit Loss, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Finished Goods, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories net of impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsegments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsegments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, Allowance for Credit Loss [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain Contingency, Nature [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Contingency, Nature [Domain]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForCreditLossMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-09, Allowance, Credit Loss [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net cash provided by (used in) financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash (used in) provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FederalHomeLoanBanksAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Banks [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CondensedStatementOfComprehensiveIncomeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Statement of Comprehensive Income [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketApproachValuationTechniqueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation, Market Approach [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total accumulated losses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuHaiHengQinNewAreaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhu Hai Heng Qin New Area.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuHaiHengQinNewAreaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhu Hai Heng Qin New Area [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuHaiHengQinNewAreaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhu Hai Heng Qin New Area</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsNetAgainstTaxLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized tax benefit net against deferred tax loss carryforwards</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsNetAgainstTaxLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns net against deferred tax assets related to tax loss carryforwards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax losses carry forward</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards, expected to be realized or consumed after one year (or the normal operating cycle, if longer).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableReInfluenceOfBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amounts charged to RE-Influence of Business Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableReInfluenceOfBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance for doubtful accounts receivable re-Influence of business acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableReInfluenceOfBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts receivable re-Influence of business acquisition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfRetainedEarningsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of retained earnings</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfRetainedEarningsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of retain earnings.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForCreditLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance for Credit Loss [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityInvestmentsAccountedForUsingFairValueOption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Investments Accounted For Using Fair Value Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityInvestmentsAccountedForUsingFairValueOption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity investments accounted for using fair value option.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internet Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Internet Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Internet Business Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ImpairmentChargeOfGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of Goodwil</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ImpairmentChargeOfGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Charge of Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ImpairmentChargeOfGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Impairment charge of goodwill.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncrementalCommonSharesAttributableToConversionOfClassbOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible Class B Ordinary shares using the if-converted method.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Valuation Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment of inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PurchaseOfEquityInterestsFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of equity interests from.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PurchaseOfEquityInterestsFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of equity interests from</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsOfDomesticSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undistributed earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UndistributedEarningsOfDomesticSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Undistributed Earnings of Domestic Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax benefit at PRC statutory rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntangibleAssetsAndAccruedExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets and accrued expenses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntangibleAssetsAndAccruedExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets and accrued expense.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentOfIncreaseInFairValueInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percent of increase in fair value investment.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationOutsideBasisDifferences_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to outside basis differences.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Role of Management [Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsBusinessCombinationValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Business Combination, Valuation Allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsBusinessCombinationValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets, business combination, valuation allowance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdjustedOperatingIncomeLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjusted operating income/(losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdjustedOperatingIncomeLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjusted operating income losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdjustedOperatingIncomeLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjusted operating income losses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: Accumulated depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Accumulated depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityInvestmentsWithReadilyDeterminableFairValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investments with readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityInvestmentsWithReadilyDeterminableFairValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity investments with readily determinable fair value [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityInvestmentsWithReadilyDeterminableFairValueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity investments with readily determinable fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TreasuryStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TreasuryStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TreasuryStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for its treasury stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomIncreasesdecreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of DLOM increases/decrease in fair value of the investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomIncreasesdecreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of DLOM Increases,Decrease in Fair Value of The Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomIncreasesdecreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of DLOM increases,decrease in fair value of the investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of assumptions used in calculating fair value of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UFACTORYTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UFACTORY Technology Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UFACTORYTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">UFACTORY Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UFACTORYTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UFACTORY [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Losses per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Contingent liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Accrual</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Loss Contingency Accrual, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Loss Contingency Accrual, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOutsideChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Overseas</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOutsideChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Countries Outside China [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOutsideChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents Countries outside China based on customers' register address.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign currency translation and transactions</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccountsReceivableRelatedPartyDebtAllowanceForCreditLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Summary Of Accounts Receivable Related Party Debt Allowance For Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccountsReceivableRelatedPartyDebtAllowanceForCreditLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Related Party Debt Allowance For Credit Loss [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccountsReceivableRelatedPartyDebtAllowanceForCreditLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounts receivable related party debt allowance for credit loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CargMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CARG [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CargMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CARG.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investments accounted for at fair value using the alternative measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities without Readily Determinable Fair Value, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity investments accounted for using the measurement alternative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementGainOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remeasurement gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementGainOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remeasurement Gain On Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementGainOnAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remeasurement gain on acquisition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UserBaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">User base [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UserBaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">User base</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UserBaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">User Base [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UserBaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information About User Base.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WithholdingIncomeTaxRateForDividendPaidToForeignTaxResidentInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Withholding income tax rate for dividend paid to foreign tax resident investors (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WithholdingIncomeTaxRateForDividendPaidToForeignTaxResidentInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Withholding Income Tax Rate For Dividend Paid To Foreign Tax Resident Investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WithholdingIncomeTaxRateForDividendPaidToForeignTaxResidentInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the withholding income tax rate for dividend paid to foreign tax resident investors.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWaveLabIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BC Wave Lab Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWaveLabIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BC Wave Lab Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWaveLabIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BC Wave Lab Inc.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RedeemableNonControllingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Non Controlling Interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RedeemableNonControllingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable non controlling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RedeemableNonControllingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Non-Controlling Interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdjustmentsToAdditionalPaidInCapitalDisposalOfVieSSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disposal of subsidiaries</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total deferred tax assets before valuation allowances</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total deferred tax assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Less: net income attributable to noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gains on disposal of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Sale of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Sale of Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash payments for income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Taxes Paid, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inome taxes paid, net of refunds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gross profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type of Arrangement and Non-arrangement Transactions [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsEquityInvestmentGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investment loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsEquityInvestmentGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Equity Investment Gain Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsEquityInvestmentGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from (gains)/losses on equity investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the operating expenses accrued during the reporting period of the entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Arrangements and Non-arrangement Transactions [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NotionalAmountOfCrossCurrencyInterestRateSwap_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noon buying rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NotionalAmountOfCrossCurrencyInterestRateSwap_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notional Amount Of Cross Currency Interest Rate Swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NotionalAmountOfCrossCurrencyInterestRateSwap_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Notional Amount Of Cross Currency Interest Rate Swap.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareAwardScheme2011Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2011 Share Award Scheme</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareAwardScheme2011Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Award Scheme 2011 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareAwardScheme2011Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information 2011 Share award scheme</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationEffectOfTaxHolidayAndPreferentialTaxRatesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective income tax rate reconciliation effect of tax holiday and preferential tax rates percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationEffectOfTaxHolidayAndPreferentialTaxRatesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation effect of tax holiday and preferential tax rates percent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationEffectOfTaxHolidayAndPreferentialTaxRatesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of tax holiday and preferential tax rates, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsNetConsolidatedBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized tax benefit presented in the other non-current liabilities line item</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsNetConsolidatedBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits Net Consolidated Balance Sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsNetConsolidatedBalanceSheet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of unrecognized tax benefits presented in the other non-current liabilities line item in the consolidated balance sheets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net (decrease) increase in cash and cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase (decrease) in cash and cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of revenues by geographical area</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investments accounted for using fair value option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StockIssuedDuringPeriodSharesExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise and vesting of share-based awards, including subsidiaries' awards , shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StockIssuedDuringPeriodSharesExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Exercise And Vesting Of Share Based Awards Including Subsidiaries Awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StockIssuedDuringPeriodSharesExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares exercise and vesting of share based awards including subsidiaries awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfCondensedBalanceSheetTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Balance Sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfCondensedBalanceSheetTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Balance Sheet [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToGeneralReserveFunds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allocations to general reserve as a percentage of profit after tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToGeneralReserveFunds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of After Tax Profit Allocated To General Reserve Funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToGeneralReserveFunds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of after-tax profit to be allocated towards the general reserve fund in accordance with the PRC Regulations on Enterprises with Foreign Investment and their articles of association.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftCheetahTechnologyCoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Beijing Kingsoft Cheetah Technology Co</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftCheetahTechnologyCoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing Kingsoft Cheetah Technology Co [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftCheetahTechnologyCoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beijing Kingsoft Cheetah Technology Co</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ordinary shares, par value (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary shares, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxFixedAssetsDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed assets depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxFixedAssetsDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Fixed Assets Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxFixedAssetsDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax fixed assets depreciation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility range, maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignTaxJurisdictionOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Tax Jurisdiction, Other [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignTaxJurisdictionOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Foreign Jurisdictions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Securities, Available-for-Sale, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-Sale Debt Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MezzanineEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mezzanine equity:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MezzanineEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mezzanine Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MezzanineEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mezzanine equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Financial Statement Error Correction [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Prepaid Expense, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AppreciationDepreciationRateOfForeignCurrencyExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Appreciation (depreciation) rate of foreign currency exchange (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AppreciationDepreciationRateOfForeignCurrencyExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Appreciation Depreciation Rate Of Foreign Currency Exchange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AppreciationDepreciationRateOfForeignCurrencyExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Appreciation or depreciation rate of foreign currency exchange.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentsGeographicalAreasAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments, Geographical Areas [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Addition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation P R C Withholding Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation PRC withholding tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRC withholding tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Related Party Debt</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ResearchAndDevelopment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ResearchAndDevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research And Development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ResearchAndDevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee costs related to personnel involved in the development and enhancement of the Group's service offerings on its websites.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ResearchAndDevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsUnappropriated_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unreserved retained earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsUnappropriated_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings, Unappropriated</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsUnappropriated_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unreserved retained losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cost of revenues [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of Sales [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Sales [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToMinorityShareholders_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of share awards and shares from noncontrolling shareholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToMinorityShareholders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of property and equipment, net by geographical area</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongLivedAssetsByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Assets by Geographic Areas [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromSubsidiariesBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity in loss of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromSubsidiariesBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Subsidiaries, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding at end of year Modified (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Modified Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options modified weighted average grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentAccountedForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Equity Investment Accounted For Gains And Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentAccountedForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Securities Equity Investment Accounted For Gains And Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentAccountedForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total (losses) gains from fair value changes, Equity investments accounted for using fair value option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivablesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivables [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Customer relationship [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer relationship</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Relationships [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Timing of Transfer of Good or Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, by Balance Sheet Grouping [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Unvested at beginning of year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Unvested at end of year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total comprehensive loss attributable to Cheetah Mobile Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilutive effect of Share-based awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedBandwidthAndInternetDataCenterExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued bandwidth and cloud service costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedBandwidthAndInternetDataCenterExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Bandwidth And Internet Data Center Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedBandwidthAndInternetDataCenterExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying value as of the balance sheet date of obligations incurred through that date and payable for bandwidth and internet data center expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of ownership</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MeasurementInputWeightedAverageCostOfCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average cost of capital [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MeasurementInputWeightedAverageCostOfCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Weighted Average Cost Of Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MeasurementInputWeightedAverageCostOfCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement input weighted average cost of capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of share-based compensation expense by function</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BaiduMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Baidu</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BaiduMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Baidu [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BaiduMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Baidu.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of deferred tax assets and deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Deferred Tax Assets and Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetNetNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetNetNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Asset Net Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetNetNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax asset net noncurrent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetNetNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AmountDueFromRelatedPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount due from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AmountDueFromRelatedPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Due From Related Parties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AmountDueFromRelatedPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount due from related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations, Per Basic Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfExpenseAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Expense [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Due to Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Due to related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investments.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrepaymentsAndOtherAssetsCurrentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for prepayments and other current assets.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total fair value of vested shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Addition</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amounts charged to expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts receivable expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IpoProbabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">IPO Probability [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IpoProbabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IPO Probability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IpoProbabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">IPO Probability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftInternetSecuritySoftwareCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing Security</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of share-based compensation expenses by function</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Cost by Plan [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableforsaleSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Available-for-sale Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income (loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sensitivity analysis of the investment in equity investment decrease WACC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Decrease In WACC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity Analysis Of The Investment In Equity Investment Decrease In WACC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill, Impairment Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment of goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue Recognition [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Appropriation to statutory common reserve</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of After Tax Profit Allocated To Statutory Common Reserve</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of after-tax profit to be allocated towards the statutory common reserve in accordance with the Company Law of the PRC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total cash consideration</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortizable intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Intangible Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Investments [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Short term investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Granted (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of unaudited condensed financial information of the Group's equity investments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTaxPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation P R C Withholding Tax, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTaxPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation PRC withholding tax, percent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationPRCWithholdingTaxPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRC withholding tax, percent</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net current-period other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingConewTechnologyDevelopmentCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing Conew</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingConewTechnologyDevelopmentCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Beijing Conew Technology Development Co., Ltd.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherRelatedPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Related Parties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherRelatedPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other Related Parties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization of intangible assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Nonrecurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill, Less Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAndImpairmentCumulativeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated downward adjustment and impairment of equity investments without readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAndImpairmentCumulativeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment and Impairment, Cumulative Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAndImpairmentCumulativeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity securities without readily determinable fair value, downward price adjustment and impairment, cumulative amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepaymentOfLoansFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of loans from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepaymentOfLoansFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayment Of Loans From Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepaymentOfLoansFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repayment of loans from related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of assets and liabilities measured or disclosed at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Forfeitures In Period Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average price of awards other than options that were either forfeited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss) on Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized (Loss) on Equity Investments using fair value option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterimPeriodCostsNotAllocableDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interim Period, Costs Not Allocable [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Current liabilities (including current liabilities of the VIEs and VIEs' subsidiaries without recourse to the Company of RMB370,798 and RMB287,680 (US$41,138) as of December 31, 2024 and 2025, respectively) (Note 1)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherOperatingIncomeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other operating income, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherOperatingIncomeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Operating Income Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherOperatingIncomeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other operating income net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DepreciationRateOfForeignCurrencyExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Depreciation rate of foreign currency exchange.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DepreciationRateOfForeignCurrencyExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation Rate Of Foreign Currency Exchange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HighNewTechnologyEnterpriseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HNTE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HighNewTechnologyEnterpriseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">High New Technology Enterprise [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HighNewTechnologyEnterpriseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to High New Technology Enterprise ("HNTE").</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest accrued related to unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Interest on Income Taxes Accrued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans Received From [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans received from.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans received from</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Receivable, after Allowance for Credit Loss, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts receivable (net of allowance for credit losses of RMB142,834 and RMB159,596 (US$22,822) as of December 31, 2024 and 2025, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Supplies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Supplies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Supplies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advances to suppliers,net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Leases [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Unvested at beginning of year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Unvested at end of year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remeasurement loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remeasurement Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RemeasurementLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remeasurement loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RevenueRecognitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue Recognition [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Credit Loss Expense (Reversal)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Addition/(Reverse)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Addition/(reverse)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Non-cash operating lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash operating lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncashOperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non-cash operating lease expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and Administrative Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Beijing Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing Security [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beijing Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total lease liability balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership interest, subsequent to transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Percentage of Ownership after Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefitsPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Worldwide Changes In Unrecognized Tax Benefits, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefitsPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation worldwide changes in unrecognized tax benefits, percent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefitsPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Worldwide changes in unrecognized tax benefits, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfGoodwillTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of changes in the carrying amount of goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfGoodwillTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Goodwill [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityIncentivePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Incentive Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityIncentivePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Incentive Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EquityIncentivePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Incentive Plans [Member].</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetsObtainedReleasedInExchangeForOperatingLeaseLiabilitiesNonCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Right-of-use assets obtained (released) in exchange for operating lease liabilities non-cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetsObtainedReleasedInExchangeForOperatingLeaseLiabilitiesNonCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right of Use Assets Obtained Released In Exchange For Operating Lease Liabilities Non Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetsObtainedReleasedInExchangeForOperatingLeaseLiabilitiesNonCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets obtained in exchange for operating lease liabilities-Non-cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseOtherNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Tax Deferred Expense Other Non Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseOtherNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from other provisions, reserves, allowances, and liabilities, which are not otherwise reflected in deferred taxes in the taxonomy, which can only be deducted for tax purposes when relevant losses are realized or actual obligations are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken representing non current portion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseOtherNonCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AvailableForSaleDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Available-for-sale debt securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AvailableForSaleDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Available-for-sale debt securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AvailableForSaleDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-sale debt security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity, Primary Beneficiary [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAppropriated_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRC statutory reserve funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAppropriated_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings, Appropriated</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JingdezhenJibaoInformationServiceCoLtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Jingdezhen Jibao Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JingdezhenJibaoInformationServiceCoLtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Jingdezhen Jibao Information Service Co Lt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JingdezhenJibaoInformationServiceCoLtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information Jingdezhen Jibao Information Service Co.,&#160;Lt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in valuation allowances, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Noncurrent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current liabilities (including non-current liabilities of the VIEs and VIEs' subsidiaries without recourse to the Company of RMB1,588 and RMB987 (US$141) as of December 31, 2024 and 2025, respectively) (Note 1)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TextBlockAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Text Block [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWAVELABPTELTDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BC WAVE LAB PTE. LTD [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWAVELABPTELTDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BC WAVE LAB PTE. LTD.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BCWAVELABPTELTDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BC WAVE LAB PTE. LTD</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of short-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Equity Method Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments to acquire equity investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Status For Taxability [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Status For Taxability [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_StatusForTaxabilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents various tax status.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedIncomeTaxesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedIncomeTaxesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Income Taxes, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Adoption of ASC 326</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Adoption of ASC 326</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adoption of ASC 326</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Adoption Of Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts receivable adoption of financial instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cheetah Intelligence Hong Kong Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cheetah Intelligence Hong Kong Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cheetah Intelligence Hong Kong Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average number of ordinary shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill acquired in business combinations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill, Acquired During Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThirdPartyAdvertisingAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Third-party advertising agents.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThirdPartyAdvertisingAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Third Party Advertising Agents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThirdPartyAdvertisingAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Third-party advertising agents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GoogleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Google</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GoogleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Google [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GoogleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Google.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldBeforeAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Equity Interest Held Before Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldBeforeAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of equity interest held before acquisition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfEquityInterestHeldBeforeAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Previously held shareholding percentage before acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DomainNamesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Domain names [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DomainNamesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Domain names</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DomainNamesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Domain Names [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DomainNamesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the Domain names.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options, incremental cost as a result of modification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Plan Modification, Incremental Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationOtherReconcilingItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationOtherReconcilingItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation of the differences between the statutory tax rate and the effective tax rate for enterprise income tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HkZoomBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HK Zoom</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HkZoomBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hk Zoom Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HkZoomBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to HK Zoom business.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services received from</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Received From [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesReceivedFromMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Services received from</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangesInOwnershipInterestsInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Changes In Ownership Interests In Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangesInOwnershipInterestsInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Changes In Ownership Interests In Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangesInOwnershipInterestsInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in equity interest of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfVariableInterestEntitiesFinancialPerformanceAndCashFlowsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Variable Interest Entities Financial Performance And Cash Flows [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfVariableInterestEntitiesFinancialPerformanceAndCashFlowsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular presentation of the financial performance and cash flows of the VIEs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfVariableInterestEntitiesFinancialPerformanceAndCashFlowsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of financial performance and cash flows of the VIEs and their subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRateOverStatedIncomeLevel_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign statutory tax rate over stated taxable income level</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRateOverStatedIncomeLevel_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Foreign Statutory Tax Rate Over Stated Income Level</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxForeignStatutoryTaxRateOverStatedIncomeLevel_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the statutory corporate income tax rate over the stated taxable income in the foreign jurisdiction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedAdvertisingCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Advertising, Current</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Parent, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total shareholders' equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentRegistrationStatement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Registration Statement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentRegistrationStatement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Registration Statement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Variable Interest Entities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of carrying amounts and classifications of the assets and liabilities of the VIEs and their subsidiaries</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInEbitMargin_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Decrease In EBIT Margin</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInEbitMargin_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity Analysis Of The Investment In Equity Investment Decrease In EBIT Margin.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToExpensesAndLossesRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination expected losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToExpensesAndLossesRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Separately Recognized Transactions Expected To Expenses And Losses Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToExpensesAndLossesRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination separately recognized transactions expected to expenses and losses recognized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of percentage of ownership in subsidiaries, its VIEs and its equity investees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsInAndAdvancesToAffiliatesScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of presentation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditLossFinancialInstrumentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Loss, Financial Instrument [Policy Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_BusinessContactMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Contact [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average fair value as of the grant date of equity-based award plans other than stock options that were forfeited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetAndOthers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use asset and others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetAndOthers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right Of Use Asset And Others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RightOfUseAssetAndOthers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Right-of-use asset and others.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Financial Information of the Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Financial Information of Parent Company Only Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingOtherItemAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other segment items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingOtherItemAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Other Segment Item, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOtherThanChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-PRC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOtherThanChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Countries Other Than China [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CountriesOtherThanChinaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to other than China</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liabilities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Tax Liabilities Noncurrent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Granted (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grant In Period Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options grant in period weighted average grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance for Credit Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForCreditLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for credit losses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of equity interest held on acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Cost of revenues (a)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cost of revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Product and Service Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cost of Goods and Services Sold, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-lived assets arising from deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intercompany Transfer Of Deferred Tax Assets Long Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Intercompany transfer of deferred tax assets long lived assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Intercompany transfer of long-lived assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Expertise of Management Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Expensed and Capitalized, Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrincipalAmountOnConvertibleLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount on convertible loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrincipalAmountOnConvertibleLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Principal Amount On Convertible Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrincipalAmountOnConvertibleLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Principal amount on convertible loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrKunWangMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mr. Kun Wang</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrKunWangMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr. Kun Wang [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrKunWangMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mr. Kun Wang.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of loans from third parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Collection of Notes Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAndOtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAndOtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax and Other Liabilities, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PurchaseObligationDueAfterThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">More than 3 Years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PurchaseObligationDueAfterThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Obligation Due After Third Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PurchaseObligationDueAfterThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase obligation due after third year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Income Taxes Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCountryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Tax Jurisdiction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration risk percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Threshold Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Concentration Risk Threshold Percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedSalaryAndWelfarePayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Salary and welfare payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedSalaryAndWelfarePayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Salary And Welfare Payable Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedSalaryAndWelfarePayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided and welfare provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-Sale Debt Securities, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross unrealized gains (upward adjustments)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized gains for the Equity investments with readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongKongSingaporeAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hong Kong Singapore And Others.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongKongSingaporeAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hong Kong Singapore And Others [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_HongKongSingaporeAndOthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hong Kong, Singapore And Others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WeightedAverageNumberOfSharesOutstandingBasicAndDilutedProformaAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number Of Shares Outstanding Basic And Diluted Proforma [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WeightedAverageNumberOfSharesOutstandingBasicAndDilutedProformaAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted Average Number Of Shares Outstanding Basic And Diluted Proforma [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EuropeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Europe [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EuropeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Europe</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Effect of tax holiday and preferential tax rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax holiday, aggregate dollar amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Effect Of Preferential Tax Rate On Deferred Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income exempt from income tax because effect of preferential tax rate on deferred tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interest, Equity, Carrying Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligationDueInSecondAndThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">1-3 Years</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PurchaseObligationDueInSecondAndThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Purchase Obligation, to be Paid, Year Two and Three, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_ContactPersonnelName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contact Personnel Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property plant and equipment, gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant and Equipment, Gross, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Gross, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized fair value gain (loss) on long-term available-for-sale debt securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaobaohongTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhuhai Baobaohong Technology Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaobaohongTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhuhai Baobaohong Technology Co., Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaobaohongTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhuhai Baobaohong Technology Co., Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible Assets, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss before taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss before income tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LicenseFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Online game licenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LicenseFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Online game licenses [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LicenseFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Fee [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LicenseFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the License fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TechnologyBasedIntangibleAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Technology-Based Intangible Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TechnologyBasedIntangibleAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReductionPercentageFollowingExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduction in tax rate for stated period following the exemption period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReductionPercentageFollowingExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reduction Percentage Following Exemption Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReductionPercentageFollowingExemptionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage by which the tax rate is reduced for the stated period following the initial exemption period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsIncludingIntangibleAssetsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsIncludingIntangibleAssetsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of long-lived assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory tax rate difference between PRC and other jurisdictions, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainContingenciesByNatureAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain Contingencies, Nature [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainContingenciesByNatureAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Contingencies, Nature [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DlomMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">DLOM [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DlomMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">DLOM.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventory, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Inventories,net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Due to Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Due to Related Parties, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash and cash equivalents and restricted cash at end of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and cash equivalents and restricted cash at beginning of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash payments for interest expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConversionOfConvertibleOtherNoncurrentAssetsToLongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of Convertible Other Noncurrent Assets To Long Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConversionOfConvertibleOtherNoncurrentAssetsToLongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of convertible other noncurrent assets to long term investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConversionOfConvertibleOtherNoncurrentAssetsToLongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of convertible other non-current assets to long-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdvertisingAgencyServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Advertising agency services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdvertisingAgencyServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advertising agency services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdvertisingAgencyServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Advertising agency services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdditionalInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional investment in acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdditionalInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Investment In Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AdditionalInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional investment in acquiree.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Disposal of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disposal of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Disposal Of A Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts receivable disposal of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepurchaseAndCancellationOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase and cancellation of noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepurchaseAndCancellationOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase and cancellation of noncontrolling interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RepurchaseAndCancellationOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase and cancellation of noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewSoftwareDevelopmentEnterprisesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Software Development Enterprise</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewSoftwareDevelopmentEnterprisesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Software Development Enterprises [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewSoftwareDevelopmentEnterprisesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents activity related to entities approved as new software development enterprises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedContributionPlanCostRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions for employee benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedContributionPlanCostRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OrionStarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">OrionStar Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OrionStarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing OrionStar</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OrionStarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Orion Star [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OrionStarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">OrionStar.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GainLossOnDispositionOfBusinessesAndStockInVariableInterestEntitiesSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Disposition Of Businesses And Stock In Variable Interest Entities Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GainLossOnDispositionOfBusinessesAndStockInVariableInterestEntitiesSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain loss on disposition of businesses and stock in variable interest entities subsidiary.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GainLossOnDispositionOfBusinessesAndStockInVariableInterestEntitiesSubsidiary_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Losses (Gains) on disposal/deemed disposal of businesses and subsidiaries/VIEs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance sheet data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DueToSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due to Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DueToSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Due To Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DueToSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represent information pertaining to amounts due to subsidiaries of the Group.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestRepaidToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans and interest repaid to</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestRepaidToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans and Interest Repaid To [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansAndInterestRepaidToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans and interest repaid to.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureNonRecourseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Entity Primary Beneficiary Aggregated Disclosure Non-recourse [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureNonRecourseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity Primary Beneficiary Aggregated Disclosure Non Recourse [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureNonRecourseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Variable Interest Entity Primary Beneficiary Aggregated Disclosure Nonrecourse</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reversal based on tax positions related to prior years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unrecognized tax benefits increases decreases resulting from prior period tax positions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other comprehensive (loss) income, net of tax of nil</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive (loss) income, net of tax of nil</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Liabilities, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ElectronicEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Electronic equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ElectronicEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Electronic equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ElectronicEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electronic Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ElectronicEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electronic tangible personal property used to produce goods and services.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Noncurrent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease in Operating lease Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (decrease) in operating lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount due from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables from advertisers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCargDecreasesIncreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of CARG decreases/increase in fair value of the investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCargDecreasesIncreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of CARG Decreases, Increase in Fair Value of the Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCargDecreasesIncreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of CARG decreases, increase in fair value of the investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Current Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current income tax expenses (benefits)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueOfPreviouslyHeldEquityInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of previously held equity interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueOfPreviouslyHeldEquityInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Previously Held Equity Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueOfPreviouslyHeldEquityInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of previously held equity interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ReservedSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserved Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ReservedSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserved Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ReservedSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to reserved shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationGainLossOnSaleOfInvestmentsAndSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Non-taxable income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationGainLossOnSaleOfInvestmentsAndSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Gain Loss on Sale of Investments and Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationGainLossOnSaleOfInvestmentsAndSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income Tax Reconciliation Gain Loss on Sale of Investments and Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangeInEquityInterestOfConsolidatedSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in equity interest of consolidated subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangeInEquityInterestOfConsolidatedSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in equity interest of consolidated subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ChangeInEquityInterestOfConsolidatedSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in equity interest of consolidated subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of risks</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConcentrationRiskPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for risks.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cheetah Intelligence Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cheetah Intelligence Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahIntelligenceIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cheetah Intelligence Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DilutiveSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dilutive Securities, Effect on Basic Earnings Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DilutiveSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Dilutive Securities, Effect on Basic Earnings Per Share, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DilutiveSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect arising from dividends declared on share awards of consolidated subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TencentGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tencent Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TencentGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tencent Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TencentGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tencent Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes Disclosure [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Disclosure [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosures pertaining to income taxes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of different tax rates in different jurisdictions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Statutory tax rate difference between PRC and other jurisdictions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalIncomeStatementElementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalIncomeStatementElementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Income Statement Elements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interest, Equity, Redemption Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Redeemable Noncontrolling Interest, Equity, Redemption Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption price of noncontrolling shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdvertisingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advertising and promotional expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdvertisingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advertising Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueInputsQuantitativeInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Inputs Quantitative Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueInputsQuantitativeInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Quantitative Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueInputsQuantitativeInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of the inputs used in the fair value measurement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Indefinite-lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Withholding tax and others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Withholding Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to withholding tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross carrying value, finite-lived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finite-Lived Intangible Assets, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesEquityMethodInvestmentNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity method investment and unrealized gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesEquityMethodInvestmentNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Equity Method Investment Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesEquityMethodInvestmentNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Tax Liabilities Equity Method Investment Noncurrent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility range, minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rest of the world</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rest of World [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to the rest of the world other than the PRC, United States and Ireland.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TotalLossesGainsEquityInvestmentsAccountedForUsingTheMeasurementAlternative_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total Losses Gains Equity Investments Accounted For Using The Measurement Alternative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TotalLossesGainsEquityInvestmentsAccountedForUsingTheMeasurementAlternative_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Total (losses) gains,Equity investments accounted for using the measurement alternative.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TotalLossesGainsEquityInvestmentsAccountedForUsingTheMeasurementAlternative_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Total losses, Equity investments accounted for using the measurement alternative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayments and other current assets, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Prepayments and other current assets, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Number&#160;of ordinary&#160;shares, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PlatformMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Platform [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PlatformMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Platform</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PlatformMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Platform [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PlatformMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to platform member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfLongtermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from disposal of long-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfLongtermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale of Long-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfLongtermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from disposals of and distributions received from long-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfValuationAllowanceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Movement of Valuation Allowances for Deferred Tax Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfValuationAllowanceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Valuation Allowance [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_SG_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SINGAPORE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_SG_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Singapore</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OfficeEquipmentAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Office equipment and fixtures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OfficeEquipmentAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office equipment and fixtures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OfficeEquipmentAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office Equipment And Fixtures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OfficeEquipmentAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tangible personal property used in an office setting and equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares subject to award</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate number of shares to be issued or transferred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaoquTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhuhai Baoqu Technology</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaoquTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhuhai Baoqu Technology Co Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaoquTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhuhai Baoqu Technology Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TimingOfTransferOfGoodOrServiceDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Timing of Transfer of Good or Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConewNetworkTechnologyBeijingCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conew Network</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConewNetworkTechnologyBeijingCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conew Network Technology Beijing Co Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConewNetworkTechnologyBeijingCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Conew Network Technology (Beijing) Co., Ltd., a wholly-owed subsidiary of the reporting entity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentFairValueForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total (losses) gains, Equity investments with readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentFairValueForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Equity Investment Fair Value For Gains And Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesEquityInvestmentFairValueForGainsAndLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Securities Equity Investment Fair Value For Gains And Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryIncomeTaxesPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegulatoryIncomeTaxesPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Income Taxes, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnBasicEarningsPerShareConversionOfClassbOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reallocation of net loss as a result of conversion of Class B into Class A ordinary shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnBasicEarningsPerShareConversionOfClassbOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dilutive Securities Effect On Basic Earnings Per Share Conversion Of Classb Ordinary Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnBasicEarningsPerShareConversionOfClassbOrdinaryShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible Class B Ordinary shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate, Non-Segment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContributionFromRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contribution from redeemable noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContributionFromRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contribution from redeemable noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net carrying value, finite-lived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Finite-Lived Intangible Assets, Net, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Finite-Lived Intangible Assets, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net carrying value, finite-lived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Method Investment, Realized Gain (Loss) on Disposal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Realized Gain (Loss) on Disposal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of change in tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccretionOfRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accretion of redeemable noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccretionOfRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accretion of redeemable noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccretionOfRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accretion of redeemable noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccretionOfRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accretion Of Redeemable Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccretionOfRedeemableNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated useful life of the property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Useful Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recently issued accounting pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Future lease Payments under Operating Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted shares activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableDeferredRevenueDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination accounts payable, deferred revenue, due to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableDeferredRevenueDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accounts Payable Deferred Revenue Due To Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableDeferredRevenueDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination recognized identifiable assets acquired and liabilities assumed accounts payable deferred revenue due to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gains) Losses on disposal of property and equipment and intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized deferred income tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Domestic Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rates, minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Domestic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareholderVotingProxyAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholder voting proxy agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareholderVotingProxyAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shareholder Voting Proxy Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareholderVotingProxyAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to shareholder voting proxy agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewsRepublicSoftwareTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">News Republic Software Technology Co., Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewsRepublicSoftwareTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">News Republic Software Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NewsRepublicSoftwareTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">News Republic Software Technology Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Due from subsidiaries and related parties, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amounts due from subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due from related parties, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Receivables, Net, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Unrealized and Realized Gains and Losses of Equity Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Holdings, Schedule of Investments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MaximumOwnershipPercentageInICP_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum ownership percentage in ICP business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MaximumOwnershipPercentageInICP_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Ownership Percentage In I C P</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MaximumOwnershipPercentageInICP_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the maximum equity interest percentage which foreign investors are allowed to own in any Internet Content Provider ("ICP") business in the PRC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ordinary shares, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease liabilities current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncentiveAwardScheme2013Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2013 Incentive Scheme</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncentiveAwardScheme2013Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Award Scheme 2013 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncentiveAwardScheme2013Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information related to the Incentive Award Scheme 2013 adopted by the entity to to recognize the contributions of certain employees and to give incentives thereto in order to retain them for the continued operation and development thereof.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SellingAndMarketingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling and marketing expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SellingAndMarketingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling And Marketing Expenses Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SellingAndMarketingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for selling and marketing costs. For those costs that cannot be capitalized, discloses whether such costs are expensed as incurred or the first period in which the selling and marketing expenses takes place. For direct response selling and marketing costs that are capitalized, describes those assets and the accounting policy used, including a description of the qualifying activity, the types of costs capitalized and the related amortization period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Noncurrent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesProvidedToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services provided to</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesProvidedToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Provided To [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ServicesProvidedToMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Services provided to</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Short-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Short-Term Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Technology</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Technology acquired or owned by the entity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SalesOfProductsAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Of Products And Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SalesOfProductsAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales of products and equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SalesOfProductsAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales of products and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Impairment Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment of investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Leases [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique, Discounted Cash Flow [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_NoTradingSymbolFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">No Trading Symbol Flag</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total comprehensive loss</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ImpactOfcovid19PolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Impact of&#160;COVID-19</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfOrdinarySharesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of ordinary share (US$)</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfOrdinarySharesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award fair value assumptions fair value of ordinary shares percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_HK_lbl" xlink:role="http://www.xbrl.org/2003/role/label">HONG KONG</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_HK_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Hong Kong</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileCallsHongKongLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cheetah Mobile Calls Hong Kong Limited</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of subsidiaries, net of cash acquired</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholders' Equity</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts and Financing Receivables [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets [Line Items]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of unrecognized tax benefits that if recognized would impact the annual effective tax rate</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftCheetahTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing Kingsoft Cheetah Technology</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingKingsoftCheetahTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents Beijing Kingsoft Cheetah Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the Beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the Ending</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss attributable to Cheetah Mobile Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">impairment recognized on property and equipment</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Tangible Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net unrealized losses on equity securities held</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessOperationAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business operation agreements</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets, net</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Measurement Input</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillImpairmentLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Al And Other Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AI and Others [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Operating Segment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other non-current assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of prepayments and other current assets, net</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeconsolidationOfSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation of Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeconsolidationOfSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation of Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeconsolidationOfSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deconsolidation of Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentIntangibleAssetStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee, Other [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Decrease In Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity analysis of the investment in equity investment decrease in Volatility.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SignificantAccountingPoliciesRevenueRecognitionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Significant Accounting Policies Revenue Recognition [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss attributable to Cheetah Mobile Inc. after accretion of redeemable noncontrolling interests and dilution effect arising from share-based awards issued by subsidiaries</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetBusinessSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Internet Business Segment [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DividendReceivedFromEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dividend received from equity method investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TaxableLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Taxable Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TaxableLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Taxable Losses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Securities, Available-for-Sale, Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit loss for available-for-sale debt security investment</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OriginationOfNotesReceivableFromEquityInvestee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to cash outflow for a loan, supported by a promissory note, granted to related parties, where one party can exercise control or significant influence over another party; excluding affiliates, owners or officers and their immediate families, pension trusts, and so forth.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Provided by (Used in) Investing Activities, Continuing Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net cash provided by (used in) investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash provided by (used in) investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueAssetsMeasuredOnRecurringBasisCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Recurring Basis Credit loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueAssetsMeasuredOnRecurringBasisCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assets measured on recurring basis credit loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueAssetsMeasuredOnRecurringBasisCreditLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnShareBasedAwardsDilutedEarningsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dilutive securities, effect on share-based awards diluted earnings per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnShareBasedAwardsDilutedEarningsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dilutive Securities, Effect On Share-based Awards Diluted Earnings Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DilutiveSecuritiesEffectOnShareBasedAwardsDilutedEarningsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dilution effect arising from share-based awards issued by subsidiaries</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MaximumPercentageOfForeignOwnershipOfPRCCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum limit of foreign ownership of PRC companies that provide internet information services</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MaximumPercentageOfForeignOwnershipOfPRCCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum percentage of foreign ownership of PRC companies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of intangible assets and accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Intangible Assets [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of intangible assets, which includes but not limited to gross carry value, accumulated amortization and net carrying value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrepaymentsAndOtherCurrentAssetsAllowanceForCreditLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of movement in the allowance for credit losses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PrepaymentsAndOtherCurrentAssetsAllowanceForCreditLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepayments and other current assets allowance for credit loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ComparativeFinancialInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comparative Information</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ComparativeFinancialInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure accounting policy on reclassification of line items in the financial statement for comparatively of financial information.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from exercise of share options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilityGrossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilityGrossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liability Gross Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilityGrossNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liability gross noncurrent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities and Other Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sensitivity analysis of the investment in equity investment increase Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Increase In Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInVolatility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity analysis of the investment in equity investment increase in Volatility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combinations</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, ending</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of goodwill impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentOfDecreaseInFairValueInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percent of decrease in fair value investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentOfDecreaseInFairValueInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percent Of Decrease In Fair Value Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentOfDecreaseInFairValueInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percent of decrease in fair value investment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOnAdditionalEquitySharesAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage on additional equity shares acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOnAdditionalEquitySharesAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage On Additional Equity Shares Acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOnAdditionalEquitySharesAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage on additional equity shares acquired.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Measurement Frequency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncontrollingInterestInConnectionWithBusinessAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling interest in connection with business acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncontrollingInterestInConnectionWithBusinessAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling interest in connection with business acquisitions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncontrollingInterestInConnectionWithBusinessAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncontrolling interest in connection with business acquisitions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NoncontrollingInterestInConnectionWithBusinessAcquisitions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccumulatedImpairmentIntangibleAssetsFiniteLived_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccumulatedImpairmentIntangibleAssetsFiniteLived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Impairment Intangible Assets Finite Lived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccumulatedImpairmentIntangibleAssetsFiniteLived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The accumulated amount of impairment loss recognized from the write-down of the carrying value of finite-lived intangible assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity Method Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investments with readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Finite-Lived Intangible Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInViesAndTheirSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contractual interests in VIEs and their subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInViesAndTheirSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Interests in VIEs and Their Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInViesAndTheirSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contractual interests in VIEs and their subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OpenTaxYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Taxable loss expiration Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OpenTaxYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Open Tax Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansGrantedToNomineeShareholdersAndViesByPrimaryBeneficiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans granted to nominee shareholders and VIEs by primary beneficiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansGrantedToNomineeShareholdersAndViesByPrimaryBeneficiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans Granted to Nominee Shareholders and VIEs by Primary Beneficiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LoansGrantedToNomineeShareholdersAndViesByPrimaryBeneficiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of loans granted by primary beneficiaries to the nominee shareholders and VIEs pursuant to the loan agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rates, maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-deductible expenses, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested Modified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award non option equity instruments modified.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested Modified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Modified Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options modified number.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInVariableInterestEntitys_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual interests in Variable Interest Entitys</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInVariableInterestEntitys_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contractual interests in Variable Interest Entitys</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContractualInterestsInVariableInterestEntitys_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contractual interests in VIEs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingOrFinanceLeasesCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating or Finance Leases Capitalized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingOrFinanceLeasesCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating or finance leases capitalized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingOrFinanceLeasesCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating or finance leases capitalized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Measurements, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total future lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Non-controlling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsModified_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Outstanding Modified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsModified_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Modified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsModified_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award non option equity instruments modified.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other than Temporary Impairment Losses, Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development superdeduction, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Research and development superdeduction, percent</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReductionInTaxesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reduction in Taxes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Selling and marketing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling and Marketing Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Selling and Marketing Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingAndMarketingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling and marketing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of shares used in computation of ordinary shares:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number Basic And Diluted, Shares Outstanding [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted Average Number Basic And Diluted, Shares Outstanding [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Total (losses) gains, Intangible assets, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill and Intangible Asset Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Goodwill and Intangible Asset Impairment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment of Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment of goodwill and intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MeasurementInputSalesGrowthRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Growth Rate [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MeasurementInputSalesGrowthRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Sales Growth Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested at end of year Modified (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Modified In Period Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options modified in period weighted average grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingExpensesAndOtherOperatingIncome_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingExpensesAndOtherOperatingIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses And Other Operating Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OperatingExpensesAndOtherOperatingIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the total of operating expenses and other operating income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EbitMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EBIT Margin [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EbitMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBIT Margin [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EbitMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">EBIT margin [Member].</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromMinorityShareholders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromMinorityShareholders_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from non-controlling shareholder capital injection</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RobotTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Robot technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RobotTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Robot Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_RobotTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Robot technology.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Uncertain tax position</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability for Uncertainty in Income Taxes, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Investments [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Short term investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShortTermInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of fair values of assets acquired and liabilities assumed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AddressTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Address Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease, Liability, Statement of Financial Position [Extensible List]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CashInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash investment in acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CashInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Investment In Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CashInvestmentInAcquiree_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash investment in acquiree.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherIncomeAndOtherExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other income and other expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherIncomeAndOtherExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income And Other Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherIncomeAndOtherExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income and Other Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award scheme term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireLongtermInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of long-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireLongtermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Long-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Convertible loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Financing Receivable, after Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAccountingStandard_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Accounting Standard</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAccountingStandard_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Accounting Standard</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Comprehensive Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets, Net (Excluding Goodwill) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment loss of equity method investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Other-than-Temporary Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfStatutoryCommonReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold percentage of statutory common reserve required to be maintained</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfStatutoryCommonReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Threshold Percentage Of Statutory Common Reserve Required To Be Maintained</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ThresholdPercentageOfStatutoryCommonReserveRequiredToBeMaintained_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the threshold percentage of statutory common reserve required to be maintained in accordance with the Company Law of the PRC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfBankDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Bank Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfBankDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment for bank loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment loss on intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment of Intangible Assets (Excluding Goodwill)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Impairment of Intangible Assets (Excluding Goodwill), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment of intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CrossCurrencyInterestRateContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cross Currency Interest Rate Contract [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CrossCurrencyInterestRateContractMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cross Currency Interest Rate Contract [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressesAddressTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Addresses, Address Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LossesGainsGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">(Losses) Gains, Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LossesGainsGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">(Losses) gains, goodwill.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LossesGainsGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total (losses) gains, Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LossesGainsGoodwill_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Losses, Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Prepaid Expense, Current, Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheepopIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cheepop Inc.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total shareholders' equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaohaowanTechnologyCoLtd1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhuhai Baohaowan Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaohaowanTechnologyCoLtd1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhuhai Baohaowan Technology Co., Ltd. 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiBaohaowanTechnologyCoLtd1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhuhai Baohaowan Technology Co., Ltd.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Amounts of Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise and vesting of share-based awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Employee Benefit Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations, Per Diluted Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sensitivity analysis of the investment in equity investment increase WACC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Increase In WACC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInWacc_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity Analysis Of The Investment In Equity Investment Increase In WACC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BytedanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bytedance Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BytedanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bytedance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BytedanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bytedance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding at beginning of year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding at end of year (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The weighted average fair value of outstanding awards on share incentive plans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized (losses)/gains on available-for-sale securities, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized (losses)/gain on available-for-sale securities, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Expenses And Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Expenses And Other Liabilities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued expenses and other liabilities disclosure text block.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Exercised</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of future amortization expense</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility range</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Less: total comprehensive income attributable to noncontrolling interests</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConewComCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conew.com Corporation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConewComCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conew.com Corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConvertibleLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ConvertibleLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Loan [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalentsInventoriesEquityMethodInvestmentDeferredTaxAssetsAndInvestmentInEquityInvestees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination assets acquired and liabilities assumed cash and equivalents inventories equity method investment deferred tax assets and investment in equity investees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Internet Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Internet Services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Internet Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accretion of redeemable noncontrolling interests</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination losses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Vested and expected to vest at end of year | shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vested and expected to vest at end of year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Vested And Expected To Vest Outstanding Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">As of the balance sheet date, the number of awards other than stock options which fully vested and expected to vest under share-based compensation plan.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Penalties related to unrecognised tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value measurement with unobservable inputs reconciliation recurring basis asset transfers net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_KY_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CAYMAN ISLANDS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_KY_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cayman Islands</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of estimated useful lives of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property Plant And Equipment Useful Life Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContingentlyRedeemableNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingently Redeemable Noncontrolling Interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContingentlyRedeemableNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingently Redeemable Noncontrolling Interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ContingentlyRedeemableNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingently redeemable noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of reconciliation of purchase price consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Contingent Consideration [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other expense , net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Additional Paid in Capital, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CountryRegion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Country Region</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-controlling interests and mezzanine equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Non-controlling interests and mezzanine equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax (benefits) expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income tax benefits/(expenses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income tax (benefits) expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Income tax benefit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total (losses) gains, Available-for-sale debt security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value (loss) gain on the long-term available-for-sale debt security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Securities, Available-for-Sale, Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NetAssetsRestrictedToTransfer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets restricted to transfer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NetAssetsRestrictedToTransfer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Assets Restricted To Transfer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_NetAssetsRestrictedToTransfer_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net assets of the entity's subsidiaries in the PRC and VIEs which are restricted to transfer to the entity either in the form of dividends, loans, or advances. The net assets include paid-up capital, statutory reserve funds and share-based compensation reserve funds.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesWealthManagementProductsGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt securities wealth management products gain loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesWealthManagementProductsGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Wealth Management Products Gain Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DebtSecuritiesWealthManagementProductsGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total (losses) gains from fair value changes, Wealth management products</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of significant unobservable inputs used in the fair value measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MulticloudLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Multicloud Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MulticloudLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Multicloud Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JiujiangOrionStarIntelligentTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Jiujiang Orion Star Intelligent Technology Co.,Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JiujiangOrionStarIntelligentTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Jiujiang Orion Star Intelligent Technology Co.,Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_JiujiangOrionStarIntelligentTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Jiujiang Orion Star Intelligent Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liability Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueRevenueRecognized1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue, Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amounts written off</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Allowance for Credit Loss, Writeoff</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number&#160;of ordinary&#160;shares, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCargmIncreasesDecreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of CARG increase/decrease in fair value of the investments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCargmIncreasesDecreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Cargm Increases decrease In Fair Value Of The Investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedAdvertisingMarketingAndPromotionalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued advertising, marketing and promotional expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedAdvertisingMarketingAndPromotionalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Advertising Marketing And Promotional Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AccruedAdvertisingMarketingAndPromotionalExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying value as of the balance sheet date of obligations incurred through that date and payable for the marketing, advertising and promoting of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationGainLossOnSaleOfInvestmentsAndSubsidiariesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective income tax rate reconciliation gain loss on sale of investments and subsidiaries percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationGainLossOnSaleOfInvestmentsAndSubsidiariesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation gain loss on sale of investments and subsidiaries percent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_EffectiveIncomeTaxRateReconciliationGainLossOnSaleOfInvestmentsAndSubsidiariesPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-taxable income, percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value measurements of financial instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding at the end of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred income tax (benefits) expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred income tax (benefits) expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Realized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Equity Securities, FV-NI, Realized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net gains on equity securities sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherNonOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherNonOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Non operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OtherNonOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other non operating expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares transferred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiJuntianElectronicTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zhuhai Juntian Electronic Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiJuntianElectronicTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zhuhai Juntian Electronic Technology Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZhuhaiJuntianElectronicTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zhuhai Juntian Electronic Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number&#160;of ordinary&#160;shares, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInEbitMargin_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sensitivity analysis of the investment in equity investment increase in EBIT margin</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInEbitMargin_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sensitivity Analysis Of The Investment In Equity Investment Increase In EBIT Margin</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInEbitMargin_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sensitivity Analysis Of The Investment In Equity Investment Increase In EBIT Margin.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Losses per share-diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Earnings (Loss) per share-diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Information by Segment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable, Trade</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInPrepaymentsAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepayments and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInPrepaymentsAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Prepayments And Other Assets Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncreaseDecreaseInPrepaymentsAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods. And The increase (decrease) during the reporting period in current assets, which are not not separately disclosed in the balance sheet and are expected to be realized or consumed within one year (or the normal operating cycle, if longer).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Outstanding Weighted Average Exercise Price [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxPreferentialTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferential tax rate</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxPreferentialTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the preferential tax rate applicable to the entity under the preferential tax treatment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GongqingchengOrionIndustrialInvestmentCenterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gongqingcheng Orion Industrial Investment Center [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GongqingchengOrionIndustrialInvestmentCenterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gongqingcheng orion industrial investment center.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GongqingchengOrionIndustrialInvestmentCenterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gongqingcheng Orion Industrial Investment Center [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AdrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">American Depositary Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AdrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ADR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net current-period other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other comprehensive income/(loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WealthManagementProducts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wealth management products.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WealthManagementProducts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wealth management products</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_WealthManagementProducts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wealth management products</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForLoanLossesExpensed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, Credit Loss, Expense (Reversal)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProvisionForLoanLossesExpensed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit loss recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingMarsHostspotTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing Mars Hostspot Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingMarsHostspotTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing Mars Hostspot Technology Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingMarsHostspotTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beijing Mars Hostspot Technology Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash and Cash Equivalents, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LargeLanguageModelTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Large language model (LLM) technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LargeLanguageModelTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Large Language Model Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_LargeLanguageModelTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Large language model technology.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OnlineAdvertisingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Online Advertising</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OnlineAdvertisingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Online Advertising [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OnlineAdvertisingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Online Advertising</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition [Line Items]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Research and development super-deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ValuationTechniqueBlackScholesMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique Black Scholes Method [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ValuationTechniqueBlackScholesMethodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation technique black scholes method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ValuationAllowanceDeferredTaxAssetAdditionsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ValuationAllowanceDeferredTaxAssetAdditionsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Allowance, Deferred Tax Asset, Additions, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ValuationAllowanceDeferredTaxAssetAdditionsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation allowance, deferred tax asset, additions, amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease, weighted average remaining lease term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Others.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_OthersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Jurisdictions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetValueaddedServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Internet value-added services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetValueaddedServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Internet valueadded services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InternetValueaddedServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Internet value-added services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Total (losses) gains,Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disposal of investment, businesses and subsidiaries included in related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Of Investment Businesses And Subsidiaries Included In Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disposal of investment, businesses and subsidiaries included in related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of estimated useful lives of intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Intangible Assets Useful Life Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfIntangibleAssetsUsefulLifeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of the useful life of assets lacking physical substance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerDilutedAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerDilutedAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continuing Operations Per Diluted American Depository Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerDilutedAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net income (loss) derived from continuing operations during the period available to each American Depository Share or unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total operating loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TwoThousandAndTwentyThreeIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and twenty three incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TwoThousandAndTwentyThreeIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand and Twenty Three Incentive Plan Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_TwoThousandAndTwentyThreeIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationChangesInUncertainTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation changes in uncertain tax positions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationChangesInUncertainTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Changes In Uncertain Tax Positions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationChangesInUncertainTaxPositions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in uncertain tax position</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Earnings/Accumulated Losses [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MarshotspotLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Marshotspot Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MarshotspotLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Marshotspot Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MarshotspotLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marshotspot Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnallocatedAmountsShareBasedCompensations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unallocated amounts share based compensations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnallocatedAmountsShareBasedCompensations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unallocated amounts share based compensations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnallocatedAmountsShareBasedCompensations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unallocated amounts-share based compensations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_UnallocatedAmountsShareBasedCompensations_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unallocated amounts-share based compensations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Country</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Country</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise and vesting of share-based awards,shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Employee Benefit Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Worldwide Changes In Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation worldwide changes in unrecognized tax benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Worldwide changes in unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZiniuFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ziniu Fund L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZiniuFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ziniu Fund LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ZiniuFundLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ziniu Fund LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current liabilities of the VIEs and VIE's subsidiaries without recourse to the Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingCheetahMobileTechnologyCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing Mobile</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingCheetahMobileTechnologyCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing Cheetah Mobile Technology Co. Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingCheetahMobileTechnologyCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Beijing Cheetah Mobile Technology Co., Ltd. ("Beijing Mobile).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInPrepaymentsAndOtherCurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disposal of investment, businesses and subsidiaries included in prepayments and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInPrepaymentsAndOtherCurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Of Investment Businesses And Subsidiaries Included In Prepayments And Other Current Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInPrepaymentsAndOtherCurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disposal of investment, businesses and subsidiaries included in prepayments and other current assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease, weighted average discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities non-current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quoted Prices in Active Markets for Identical Assets (Level 1)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash (used in) provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash used in financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount before allocation of valuation allowances of deferred tax asset, non-current attributable to deductible temporary differences from compensation and benefits costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value change</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfAccruedLiabilitiesAndOtherLiabilitiesCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of accrued expenses and other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfAccruedLiabilitiesAndOtherLiabilitiesCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accrued Liabilities And Other Liabilities Current Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ScheduleOfAccruedLiabilitiesAndOtherLiabilitiesCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of the components of accrued liabilities and other current liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized gains for equity investments with readily determinable fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ToolsDiesAndMoldsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mold and tooling</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ToolsDiesAndMoldsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tools, Dies and Molds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in fair value method investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investments, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investment accounted for under fair value option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCashAndCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Cash And Cash Equivalents And Short Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCashAndCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents percentage of cash and cash equivalents and short term investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfCashAndCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, restricted cash and short-term investments held percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (expenses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Contract [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Contract [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCreditDerivativesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Derivative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DividendDeclaredByConsolidatedSubsidiaryToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared on share awards of consolidated subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DividendDeclaredByConsolidatedSubsidiaryToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Declared by Consolidated Subsidiary to Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DividendDeclaredByConsolidatedSubsidiaryToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dividend declared by consolidated subsidiary to noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfCondensedCashFlowStatementTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Cash Flow Statement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfCondensedCashFlowStatementTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Cash Flow Statement [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLongTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Long-Term Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLongTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Investment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Jurisdiction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrShengFuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mr. Sheng Fu</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrShengFuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr. Sheng Fu [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_MrShengFuMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mr. Sheng Fu.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment in subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_InvestmentInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment in subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomDecreasesincreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of DLOM decreases/increase in fair value of the investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomDecreasesincreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of DLOM Decreases,Increase in Fair Value of The Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PercentageOfDlomDecreasesincreaseInFairValueOfTheInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of DLOM decreases,increase in fair value of the investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesRelatedParty_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amount of transactions with related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses, Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredOverTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transferred over Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredOverTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">At Over Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercised (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercises Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average fair value as of the grant date of equity-based award plans other than stock options that were exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAcquiredIntangibleAssetsAmortizationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination amortization period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAcquiredIntangibleAssetsAmortizationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Acquired Intangible Assets Amortization Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAcquiredIntangibleAssetsAmortizationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination acquired intangible assets amortization period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ClassificationInTheConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Classification in the consolidated balance sheets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ClassificationInTheConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classification In The Consolidated Balance Sheets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ClassificationInTheConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Classification in the consolidated balance sheets abstract.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Foreign Exchange effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign Exchange effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Exchange effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Foreign Exchange Effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts receivable foreign exchange effect.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Noncurrent Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerBasicAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerBasicAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continuing Operations Per Basic American Depository Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_IncomeLossFromContinuingOperationsPerBasicAmericanDepositoryShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net income (loss) from continuing operations per each American Depository share or unit outstanding during the reporting period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Revenues:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues (a)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of ordinary share (US$)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Due from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Due from Related Parties, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Due from Related Parties, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GeographicalInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GeographicalInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical Information [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_GeographicalInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the entire disclosure for information about geographical area.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans, Notes, Trade and Other Receivables Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interest [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of redeemable non-controlling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PeriodOfNoticeForTerminationBeforeExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period of notice to terminate the agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PeriodOfNoticeForTerminationBeforeExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period Of Notice For Termination Before Expiration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_PeriodOfNoticeForTerminationBeforeExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the notice period for termination of agreement to be provided with in expiration.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndCashEquivalentsAndInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination assets acquired and liabilities assumed cash and cash equivalents and inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndCashEquivalentsAndInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Assets Acquired And Liabilities Assumed Cash And Cash Equivalents And Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndCashEquivalentsAndInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination assets acquired and liabilities assumed cash and cash equivalents and inventories.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Effect of exchange rate changes on cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of exchange rate changes on cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingOrionstarTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing OrionStar Technology Co Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingOrionstarTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Beijing Orion Star Technology Co.,Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingOrionstarTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beijing OrionStar Technology Co. Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingOrionstarTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beijing OrionStar Technology Co. Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Due to subsidiaries and related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Due to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Others</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Lease, Cost</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CN_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CN_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CHINA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Denominator:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Opinion [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TrademarksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trademark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TrademarksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trademarks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_copyOfTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Trademarks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_copyOfTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trademarks</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_copyOfTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">copy Of Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_copyOfTechnologyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">A symbol, word, or words legally registered or established by use as representing a company or product.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingCheetahNetworkTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beijing Cheetah Network Technology Co Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_BeijingCheetahNetworkTechnologyCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beijing Cheetah Network Technology Co Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Interest on Income Taxes Expense</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileSealIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cheetah Mobile Seal Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileSealIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cheetah Mobile Seal Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_CheetahMobileSealIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cheetah Mobile Seal Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesIntangibleAssetsAcquiredFromBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets acquired from business acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesIntangibleAssetsAcquiredFromBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Intangible Assets Acquired from Business Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DeferredTaxLiabilitiesIntangibleAssetsAcquiredFromBusinessAcquisition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities intangible assets acquired from business acquisition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AiRelatedEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">AI related equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AiRelatedEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AI related equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_AiRelatedEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AI Related Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ReceivablesImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for credit losses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_ReceivablesImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The impairment charge against earnings resulting from the write down of receivables due to the difference between the carrying value and lower fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected period over which unamortized compensation costs is to be recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, and Short-Term Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, and Short-Term Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, restricted cash and short-term investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Numerator:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign exchange translation adjustments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Exchange Adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Exchange Adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AffiliatedEntityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Affiliated Entity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AffiliatedEntityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Affiliated Entity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Stock by Class [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock, Class of Stock [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredAtPointInTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transferred at Point in Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransferredAtPointInTimeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">At a Point in Time [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Indefinite-lived Intangible Assets [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite-Lived Intangible Assets [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DreamAheadPteLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dream Ahead Pte. Ltd.[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DreamAheadPteLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dream Ahead Pte. Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cmcm_DreamAheadPteLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dream Ahead</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_GovernmentSubsidiesPolicyTextBlock" xlink:to="cmcm_GovernmentSubsidiesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree" xlink:to="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_LiveMeIncMember" xlink:to="cmcm_LiveMeIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_SummaryOfSignificantOfAccountingPoliciesTable" xlink:to="cmcm_SummaryOfSignificantOfAccountingPoliciesTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_OtherLiabilitiesNoncurrentTableTextBlock" xlink:to="cmcm_OtherLiabilitiesNoncurrentTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities" xlink:to="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember" xlink:to="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_IncomeTaxForeignStatutoryTaxRate" xlink:to="cmcm_IncomeTaxForeignStatutoryTaxRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_StatusForTaxabilityAxis" xlink:to="cmcm_StatusForTaxabilityAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:to="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cmcm_RestrictedSharesWithOptionFeatureMember" xlink:to="cmcm_RestrictedSharesWithOptionFeatureMember_lbl"/>
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  <xsd:element id="cmcm_OnlineAdvertisingMember" name="OnlineAdvertisingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CargMember" name="CargMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CountriesOutsideChinaMember" name="CountriesOutsideChinaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_SummaryOfSignificantOfAccountingPoliciesTable" name="SummaryOfSignificantOfAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_NotionalAmountOfCrossCurrencyInterestRateSwap" name="NotionalAmountOfCrossCurrencyInterestRateSwap" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_OperatingExpensesAndOtherOperatingIncome" name="OperatingExpensesAndOtherOperatingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ConcentrationRiskPolicyTextBlock" name="ConcentrationRiskPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ScheduleOfRetainedEarningsTableTextBlock" name="ScheduleOfRetainedEarningsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DeconsolidationOfSubsidiariesMember" name="DeconsolidationOfSubsidiariesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncreaseDecreaseInAccruedExpenseAndOtherLiabilitiesCurrent" name="IncreaseDecreaseInAccruedExpenseAndOtherLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToExpensesAndLossesRecognized" name="BusinessCombinationSeparatelyRecognizedTransactionsExpectedToExpensesAndLossesRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DepreciationAndOtherAmortizationExpense" name="DepreciationAndOtherAmortizationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ShareholderVotingProxyAgreementsMember" name="ShareholderVotingProxyAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_OtherMember" name="OtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZhuhaiBaoquTechnologyCoLtdMember" name="ZhuhaiBaoquTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_InvestmentsTable" name="InvestmentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxAssetsBusinessCombinationValuationAllowance" name="DeferredTaxAssetsBusinessCombinationValuationAllowance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_BCWaveLabIncMember" name="BCWaveLabIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ThirdPartyAdvertisingAgentsMember" name="ThirdPartyAdvertisingAgentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_OperatingOrFinanceLeasesCapitalized" name="OperatingOrFinanceLeasesCapitalized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DeferredTaxLiabilitiesIntangibleAssetsAcquiredFromBusinessAcquisition" name="DeferredTaxLiabilitiesIntangibleAssetsAcquiredFromBusinessAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_PercentOfDecreaseInFairValueInvestment" name="PercentOfDecreaseInFairValueInvestment" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_NewlyAdoptedAccountingStandardUpdatesPolicyTextBlock" name="NewlyAdoptedAccountingStandardUpdatesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ScheduleOfVariableInterestEntitiesFinancialPerformanceAndCashFlowsTextBlock" name="ScheduleOfVariableInterestEntitiesFinancialPerformanceAndCashFlowsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_InvestmentInSubsidiaries" name="InvestmentInSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_TencentGroupMember" name="TencentGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReductionPercentageFollowingExemptionPeriod" name="IncomeTaxReductionPercentageFollowingExemptionPeriod" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_HongKongSingaporeAndOthersMember" name="HongKongSingaporeAndOthersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ClassificationInTheConsolidatedBalanceSheetsAbstract" name="ClassificationInTheConsolidatedBalanceSheetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_TaxableLosses" name="TaxableLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_BaiduMember" name="BaiduMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PrepaymentsAndOtherCurrentAssetsAllowanceForCreditLossTableTextBlock" name="PrepaymentsAndOtherCurrentAssetsAllowanceForCreditLossTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_BusinessCombinationSeparatelyRecognizedTransactionsExpectedToRevenuesAndGainsRecognized" name="BusinessCombinationSeparatelyRecognizedTransactionsExpectedToRevenuesAndGainsRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IncreaseDecreaseInOperatingLeaseLiabilities" name="IncreaseDecreaseInOperatingLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ConvertibleLoanMember" name="ConvertibleLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ScheduleOfAccruedLiabilitiesAndOtherLiabilitiesCurrentTableTextBlock" name="ScheduleOfAccruedLiabilitiesAndOtherLiabilitiesCurrentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_FirstTwoMillionOfProfitEarnedMember" name="FirstTwoMillionOfProfitEarnedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ImpactOfcovid19PolicyTextBlock" name="ImpactOfcovid19PolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_InternetBusinessMember" name="InternetBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_GainLossOnDispositionOfBusinessesAndStockInVariableInterestEntitiesSubsidiary" name="GainLossOnDispositionOfBusinessesAndStockInVariableInterestEntitiesSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_WithholdingIncomeTaxRateForDividendPaidToForeignTaxResidentInvestors" name="WithholdingIncomeTaxRateForDividendPaidToForeignTaxResidentInvestors" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_LargeLanguageModelTechnologyMember" name="LargeLanguageModelTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DebtSecuritiesEquityInvestmentAccountedForGainsAndLosses" name="DebtSecuritiesEquityInvestmentAccountedForGainsAndLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationOutsideBasisDifferences" name="IncomeTaxReconciliationOutsideBasisDifferences" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_AdjustmentsToAdditionalPaidInCapitalDisposalOfVieSSubsidiary" name="AdjustmentsToAdditionalPaidInCapitalDisposalOfVieSSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IncomeTaxPreferentialTaxRate" name="IncomeTaxPreferentialTaxRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AmountDueFromRelatedPartiesMember" name="AmountDueFromRelatedPartiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_LoansAndInterestReceivedFromMember" name="LoansAndInterestReceivedFromMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BeijingOrionstarTechnologyCoLtdMember" name="BeijingOrionstarTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets" name="IntercompanyTransferOfDeferredTaxAssetsLongLivedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_UnrecognizedTaxBenefitsNetAgainstTaxLossCarryforwards" name="UnrecognizedTaxBenefitsNetAgainstTaxLossCarryforwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_MeasurementInputSalesGrowthRateMember" name="MeasurementInputSalesGrowthRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AvailableForSaleDebtSecurities" name="AvailableForSaleDebtSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ChangesInOwnershipInterestsInSubsidiaries" name="ChangesInOwnershipInterestsInSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationWithholdingTaxPercent" name="IncomeTaxReconciliationWithholdingTaxPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureNonRecourseMember" name="VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureNonRecourseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInVolatility" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInVolatility" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_InternetBusinessSegmentMember" name="InternetBusinessSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_WeightedAverageNumberOfSharesOutstandingBasicAndDilutedProformaAbstract" name="WeightedAverageNumberOfSharesOutstandingBasicAndDilutedProformaAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationWithholdingTax" name="IncomeTaxReconciliationWithholdingTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DeferredTaxAssetsNoncurrentAbstract" name="DeferredTaxAssetsNoncurrentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PixiuGroupMember" name="PixiuGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DividendDeclaredByConsolidatedSubsidiaryToNoncontrollingInterests" name="DividendDeclaredByConsolidatedSubsidiaryToNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardOfSubsidiariesTable" name="ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardOfSubsidiariesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxLiabilitiesEquityMethodInvestmentNoncurrent" name="DeferredTaxLiabilitiesEquityMethodInvestmentNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_KingsoftGroupMember" name="KingsoftGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_UserBaseMember" name="UserBaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BeijingConewTechnologyDevelopmentCoLtdMember" name="BeijingConewTechnologyDevelopmentCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AccountsReceivableRelatedPartyDebtAllowanceForCreditLossTableTextBlock" name="AccountsReceivableRelatedPartyDebtAllowanceForCreditLossTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_EarningsPerAds" name="EarningsPerAds" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ThresholdPercentageOfGeneralReserveRequiredToBeMaintained" name="ThresholdPercentageOfGeneralReserveRequiredToBeMaintained" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_LoansAndInterestRepaidToMember" name="LoansAndInterestRepaidToMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AccretionOfRedeemableNoncontrollingInterests" name="AccretionOfRedeemableNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_MrKunWangMember" name="MrKunWangMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ValuationTechniqueBlackScholesMethodMember" name="ValuationTechniqueBlackScholesMethodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AmountDueToRelatedPartiesMember" name="AmountDueToRelatedPartiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CheetahInformationTechnologyCompanyLimitedMember" name="CheetahInformationTechnologyCompanyLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxesDisclosureTable" name="IncomeTaxesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CountriesOtherThanChinaMember" name="CountriesOtherThanChinaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_RepaymentOfLoansFromRelatedParties" name="RepaymentOfLoansFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsModified" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsModified" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_BusinessCombinationAcquiredIntangibleAssetsAmortizationPeriod" name="BusinessCombinationAcquiredIntangibleAssetsAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ReservedSharesMember" name="ReservedSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstruments" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstruments" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_GoogleMember" name="GoogleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExerciseMultiple" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExerciseMultiple" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_IncomeTaxesLineItems" name="IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalentsInventoriesEquityMethodInvestmentDeferredTaxAssetsAndInvestmentInEquityInvestees" name="BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalentsInventoriesEquityMethodInvestmentDeferredTaxAssetsAndInvestmentInEquityInvestees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefitsPercent" name="IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefitsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_WithholdingIncomeTaxRateOnDividendsDistributedByForeignInvestedEnterprise" name="WithholdingIncomeTaxRateOnDividendsDistributedByForeignInvestedEnterprise" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_LiveMeMember" name="LiveMeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_MrShengFuMember" name="MrShengFuMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_EffectiveIncomeTaxRateReconciliationGainLossOnSaleOfInvestmentsAndSubsidiariesPercent" name="EffectiveIncomeTaxRateReconciliationGainLossOnSaleOfInvestmentsAndSubsidiariesPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_GainLossOnDividendsReceived" name="GainLossOnDividendsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsModifiedInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsModifiedInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_PercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve" name="PercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShortTermInvestmentsPolicyTextBlock" name="ShortTermInvestmentsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ImpairmentChargeOfGoodwill" name="ImpairmentChargeOfGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_IncomeTaxForeignStatutoryTaxRate" name="IncomeTaxForeignStatutoryTaxRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ConcentrationRiskThresholdPercentage" name="ConcentrationRiskThresholdPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_RightOfUseAssetsObtainedReleasedInExchangeForOperatingLeaseLiabilitiesNonCash" name="RightOfUseAssetsObtainedReleasedInExchangeForOperatingLeaseLiabilitiesNonCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_TechnologyMember" name="TechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndCashEquivalentsAndInventories" name="BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedCashAndCashEquivalentsAndInventories" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_UnallocatedAmountsShareBasedCompensations" name="UnallocatedAmountsShareBasedCompensations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ElectronicEquipmentMember" name="ElectronicEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ResearchAndDevelopmentMember" name="ResearchAndDevelopmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxExemptionPeriod" name="IncomeTaxExemptionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_OrionStarMember" name="OrionStarMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNoncurrent" name="DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_StatusForTaxabilityDomain" name="StatusForTaxabilityDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BusinessCombinationAndNoncontrollingInterestPolicyTextBlock" name="BusinessCombinationAndNoncontrollingInterestPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ComparativeFinancialInformationPolicyTextBlock" name="ComparativeFinancialInformationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_OtherOperatingIncomeNet" name="OtherOperatingIncomeNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RepurchaseAndCancellationOfNoncontrollingInterest" name="RepurchaseAndCancellationOfNoncontrollingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RobotTechnologyMember" name="RobotTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZhuhaiBaobaohongTechnologyCoLtdMember" name="ZhuhaiBaobaohongTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AccumulatedImpairmentIntangibleAssetsFiniteLived" name="AccumulatedImpairmentIntangibleAssetsFiniteLived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_DueToRelatedParties" name="DueToRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInVolatility" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInVolatility" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInRelatedParties" name="DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignExchangeAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_JiujiangOrionStarIntelligentTechnologyCoLtdMember" name="JiujiangOrionStarIntelligentTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IntangibleAssetsTable" name="IntangibleAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_VolatilityMember" name="VolatilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_TreasuryStockPolicyTextBlock" name="TreasuryStockPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInWacc" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInWacc" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_CheetahMobileSingaporePteLtdMember" name="CheetahMobileSingaporePteLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedInPeriodWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_MarshotspotLimitedMember" name="MarshotspotLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ScheduleOfIntangibleAssetsTableTextBlock" name="ScheduleOfIntangibleAssetsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DeferredTaxFixedAssetsDepreciation" name="DeferredTaxFixedAssetsDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_EquityInvestmentsWithReadilyDeterminableFairValueMember" name="EquityInvestmentsWithReadilyDeterminableFairValueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareAwardScheme2011Member" name="ShareAwardScheme2011Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_FairValueInputsQuantitativeInformationLineItems" name="FairValueInputsQuantitativeInformationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CheetahIntelligenceIncMember" name="CheetahIntelligenceIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ForwardVisionCorporationLimitedMember" name="ForwardVisionCorporationLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_RevenueRecognitionTable" name="RevenueRecognitionTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DreamAheadPteLtdMember" name="DreamAheadPteLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardOfSubsidiariesTextBlock" name="DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardOfSubsidiariesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationGainLossOnSaleOfInvestmentsAndSubsidiaries" name="IncomeTaxReconciliationGainLossOnSaleOfInvestmentsAndSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_OthersMember" name="OthersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" name="WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BytedanceMember" name="BytedanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxAssetsEquityInvestmentGainLoss" name="DeferredTaxAssetsEquityInvestmentGainLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ValuationAllowanceDeferredTaxAssetAdditionsAmount" name="ValuationAllowanceDeferredTaxAssetAdditionsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_IncomeLossFromContinuingOperationsPerDilutedAmericanDepositoryShare" name="IncomeLossFromContinuingOperationsPerDilutedAmericanDepositoryShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_OtherNonoperatingIncomeMember" name="OtherNonoperatingIncomeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AmericanDepositorySharesMember" name="AmericanDepositorySharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PrincipalAmountOnConvertibleLoans" name="PrincipalAmountOnConvertibleLoans" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_OtherLiabilitiesNoncurrentTableTextBlock" name="OtherLiabilitiesNoncurrentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ZhuhaiHainiaoTechnologyCoLtdMember" name="ZhuhaiHainiaoTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInPrepaymentsAndOtherCurrentAssets" name="DisposalOfInvestmentBusinessesAndSubsidiariesIncludedInPrepaymentsAndOtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RedeemableNonControllingInterestsMember" name="RedeemableNonControllingInterestsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncreaseDecreaseInPrepaymentsAndOtherAssetsCurrent" name="IncreaseDecreaseInPrepaymentsAndOtherAssetsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_MrWeiLiuMember" name="MrWeiLiuMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_InvestmentsTextBlock" name="InvestmentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SalesOfProductsAndEquipmentMember" name="SalesOfProductsAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_GovernmentSubsidiesPolicyTextBlock" name="GovernmentSubsidiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_CheepopIncMember" name="CheepopIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_MsWeiqinQiuMember" name="MsWeiqinQiuMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions" name="UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_GongqingchengOrionIndustrialInvestmentCenterMember" name="GongqingchengOrionIndustrialInvestmentCenterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_OtherRelatedPartiesMember" name="OtherRelatedPartiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BeijingCheetahNetworkTechnologyCoLtdMember" name="BeijingCheetahNetworkTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_RightOfUseAssetAndOthers" name="RightOfUseAssetAndOthers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RestrictedSharesWithOptionFeatureMember" name="RestrictedSharesWithOptionFeatureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ServicesReceivedFromMember" name="ServicesReceivedFromMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_StockIssuedDuringPeriodValueExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards" name="StockIssuedDuringPeriodValueExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ConewComCorporationMember" name="ConewComCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ChangeInEquityInterestOfConsolidatedSubsidiaries" name="ChangeInEquityInterestOfConsolidatedSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DividendReceivedFromEquityMethodInvestments" name="DividendReceivedFromEquityMethodInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_BeijingMarsHostspotTechnologyCoLtdMember" name="BeijingMarsHostspotTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_NewSoftwareDevelopmentEnterprisesMember" name="NewSoftwareDevelopmentEnterprisesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_OriginationOfNotesReceivableFromEquityInvestee" name="OriginationOfNotesReceivableFromEquityInvestee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RemeasurementGainOnAcquisition" name="RemeasurementGainOnAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanExercisableNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DueToSubsidiariesMember" name="DueToSubsidiariesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_LoansReceivedFromMember" name="LoansReceivedFromMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DepreciationRateOfForeignCurrencyExchange" name="DepreciationRateOfForeignCurrencyExchange" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesPercent" name="EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInEbitMargin" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentDecreaseInEbitMargin" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_CheetahMobileCallsHongKongLimitedMember" name="CheetahMobileCallsHongKongLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_EffectiveIncomeTaxRateReconciliationEffectOfTaxHolidayAndPreferentialTaxRatesPercent" name="EffectiveIncomeTaxRateReconciliationEffectOfTaxHolidayAndPreferentialTaxRatesPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_EquityInvestmentsAccountedForUsingFairValueOption" name="EquityInvestmentsAccountedForUsingFairValueOption" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_AcquisitionOfPropertyIncludedInAccruedExpensesAndOtherCurrentLiabilities" name="AcquisitionOfPropertyIncludedInAccruedExpensesAndOtherCurrentLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities" name="BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherCurrentLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IntangibleAssetsLineItems" name="IntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PercentageOfDlomIncreasesdecreaseInFairValueOfTheInvestments" name="PercentageOfDlomIncreasesdecreaseInFairValueOfTheInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AccountReceivableRelatedPartyMember" name="AccountReceivableRelatedPartyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PurchaseOfEquityInterestsFromMember" name="PurchaseOfEquityInterestsFromMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_MeasurementInputWeightedAverageCostOfCapitalMember" name="MeasurementInputWeightedAverageCostOfCapitalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationChangesInUncertainTaxPositions" name="IncomeTaxReconciliationChangesInUncertainTaxPositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ThresholdPercentageOfStatutoryCommonReserveRequiredToBeMaintained" name="ThresholdPercentageOfStatutoryCommonReserveRequiredToBeMaintained" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_GeographicalInformationTextBlock" name="GeographicalInformationTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsNoncurrent" name="DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_AdvertisingAgencyServicesMember" name="AdvertisingAgencyServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ReceivablesImpairmentCharges" name="ReceivablesImpairmentCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_LiveMeIncMember" name="LiveMeIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZhuhaiBaohaowanTechnologyCoLtd1Member" name="ZhuhaiBaohaowanTechnologyCoLtd1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_JingdezhenJibaoInformationServiceCoLtMember" name="JingdezhenJibaoInformationServiceCoLtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_StatusForTaxabilityAxis" name="StatusForTaxabilityAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AccruedOperatingExpenses" name="AccruedOperatingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_LongTermInvestmentsTextBlock" name="LongTermInvestmentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DeferredTaxLiabilitiesNoncurrentAbstract" name="DeferredTaxLiabilitiesNoncurrentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_UnrecognizedTaxBenefitsNetConsolidatedBalanceSheet" name="UnrecognizedTaxBenefitsNetConsolidatedBalanceSheet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_RestrictedSharePlan2014Member" name="RestrictedSharePlan2014Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeLossFromContinuingOperationsPerBasicAmericanDepositoryShare" name="IncomeLossFromContinuingOperationsPerBasicAmericanDepositoryShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationPRCWithholdingTax" name="IncomeTaxReconciliationPRCWithholdingTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_PercentageOfAfterTaxProfitAllocatedToGeneralReserveFunds" name="PercentageOfAfterTaxProfitAllocatedToGeneralReserveFunds" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_LossesGainsGoodwill" name="LossesGainsGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_BusinessOperationAgreementsMember" name="BusinessOperationAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_TotalLossesGainsEquityInvestmentsAccountedForUsingTheMeasurementAlternative" name="TotalLossesGainsEquityInvestmentsAccountedForUsingTheMeasurementAlternative" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent" name="DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ContingentlyRedeemableNoncontrollingInterestsMember" name="ContingentlyRedeemableNoncontrollingInterestsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReclassification" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetReclassification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_FairValueOfPreviouslyHeldEquityInterests" name="FairValueOfPreviouslyHeldEquityInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_DebtSecuritiesWealthManagementProductsGainLoss" name="DebtSecuritiesWealthManagementProductsGainLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_AccruedSalaryAndWelfarePayableCurrent" name="AccruedSalaryAndWelfarePayableCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_NetAssetsRestrictedToTransfer" name="NetAssetsRestrictedToTransfer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_IpoProbabilityMember" name="IpoProbabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AllowanceForDoubtfulAccountsReceivableExpenses" name="AllowanceForDoubtfulAccountsReceivableExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_PurchaseObligationDueAfterThirdYear" name="PurchaseObligationDueAfterThirdYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_AccumulatedImpairmentOfPropertyPlantAndEquipment" name="AccumulatedImpairmentOfPropertyPlantAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInWacc" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInWacc" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_FairValueInputsQuantitativeInformationTable" name="FairValueInputsQuantitativeInformationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ProceedFromDisposalOfSubsidiariesNetOfCashBalanceAtDisposedEntities" name="ProceedFromDisposalOfSubsidiariesNetOfCashBalanceAtDisposedEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_TwoThousandAndTwentyThreeIncentivePlanMember" name="TwoThousandAndTwentyThreeIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_OtherIncomeAndOtherExpenseMember" name="OtherIncomeAndOtherExpenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary" name="AllowanceForDoubtfulAccountsReceivableDisposalOfASubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_AppreciationDepreciationRateOfForeignCurrencyExchange" name="AppreciationDepreciationRateOfForeignCurrencyExchange" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SharesConversionRatio" name="SharesConversionRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_StockIssuedDuringPeriodSharesExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards" name="StockIssuedDuringPeriodSharesExerciseAndVestingOfShareBasedAwardsIncludingSubsidiariesAwards" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_RevenueRecognitionLineItems" name="RevenueRecognitionLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PercentageOfCashAndCashEquivalentsAndShortTermInvestments" name="PercentageOfCashAndCashEquivalentsAndShortTermInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInEbitMargin" name="SensitivityAnalysisOfTheInvestmentInEquityInvestmentIncreaseInEbitMargin" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_LicenseFeeMember" name="LicenseFeeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_CashInvestmentInAcquiree" name="CashInvestmentInAcquiree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ContractualInterestsInViesAndTheirSubsidiaries" name="ContractualInterestsInViesAndTheirSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_InvestmentDeficitInSubsidiaries" name="InvestmentDeficitInSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_LongTermInvestmentsTableTextBlock" name="LongTermInvestmentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AccruedBandwidthAndInternetDataCenterExpenses" name="AccruedBandwidthAndInternetDataCenterExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_MulticloudManagementServicesMember" name="MulticloudManagementServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BeijingSecurityMember" name="BeijingSecurityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PrepaymentsAndOtherAssetsCurrentDisclosureTextBlock" name="PrepaymentsAndOtherAssetsCurrentDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_EbitMarginMember" name="EbitMarginMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_FairValueAssetsMeasuredOnRecurringBasisCreditLoss" name="FairValueAssetsMeasuredOnRecurringBasisCreditLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_PercentageOfEquityInterestHeldOnAcquisition" name="PercentageOfEquityInterestHeldOnAcquisition" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_TermOfBusinessOperationAgreement" name="TermOfBusinessOperationAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SignificantAccountingPoliciesRevenueRecognitionAbstract" name="SignificantAccountingPoliciesRevenueRecognitionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableDeferredRevenueDueToRelatedParties" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableDeferredRevenueDueToRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_AccruedAdvertisingMarketingAndPromotionalExpenses" name="AccruedAdvertisingMarketingAndPromotionalExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_RestOfWorldMember" name="RestOfWorldMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncrementalCommonSharesAttributableToConversionOfClassbOrdinaryShares" name="IncrementalCommonSharesAttributableToConversionOfClassbOrdinaryShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_MaximumPercentageOfForeignOwnershipOfPRCCompanies" name="MaximumPercentageOfForeignOwnershipOfPRCCompanies" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ContractualInterestsInVariableInterestEntitys" name="ContractualInterestsInVariableInterestEntitys" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_PercentOfIncreaseInFairValueInvestment" name="PercentOfIncreaseInFairValueInvestment" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_WealthManagementProducts" name="WealthManagementProducts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_CheetahMobileHongKongLimitedMember" name="CheetahMobileHongKongLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PeriodOfNoticeForTerminationBeforeExpiration" name="PeriodOfNoticeForTerminationBeforeExpiration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_DebtSecuritiesEquityInvestmentFairValueForGainsAndLosses" name="DebtSecuritiesEquityInvestmentFairValueForGainsAndLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_DeferredTaxAssetNetNoncurrent" name="DeferredTaxAssetNetNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ConvenienceTranslationPolicyTextBlock" name="ConvenienceTranslationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_OfficeEquipmentAndFixturesMember" name="OfficeEquipmentAndFixturesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_SaleAndRentalOfRoboticProductsMember" name="SaleAndRentalOfRoboticProductsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxLiabilityCurrent" name="DeferredTaxLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefits" name="IncomeTaxReconciliationWorldwideChangesInUnrecognizedTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DilutiveSecuritiesEffectOnBasicEarningsPerShareConversionOfClassbOrdinaryShares" name="DilutiveSecuritiesEffectOnBasicEarningsPerShareConversionOfClassbOrdinaryShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ConversionOfConvertibleOtherNoncurrentAssetsToLongTermInvestments" name="ConversionOfConvertibleOtherNoncurrentAssetsToLongTermInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_BeijingCheetahMobileTechnologyCo.Ltd.Member" name="BeijingCheetahMobileTechnologyCo.Ltd.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZiniuFundLpMember" name="ZiniuFundLpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_HighNewTechnologyEnterpriseMember" name="HighNewTechnologyEnterpriseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax" name="IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_UFACTORYTechnologyCoLtdMember" name="UFACTORYTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTaxes" name="IncomeTaxReconciliationEffectOfPreferentialTaxRateOnDeferredTaxes" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments" name="AllowanceForDoubtfulAccountsReceivableAdoptionOfFinancialInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_IntangibleAssetsAndAccruedExpense" name="IntangibleAssetsAndAccruedExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_SummaryOfSignificantOfAccountingPoliciesLineItems" name="SummaryOfSignificantOfAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_BusinessCombinationConsiderationTransferredSettlementOfConvertibleLoanProvidedToAcquiree" name="BusinessCombinationConsiderationTransferredSettlementOfConvertibleLoanProvidedToAcquiree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_PaymentsToAcquirePropertyPlantAndEquipmentAndIntangibleAssets" name="PaymentsToAcquirePropertyPlantAndEquipmentAndIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ForeignCurrencyExchangeGainLossNet" name="ForeignCurrencyExchangeGainLossNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_InternetServicesMember" name="InternetServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DeferredTaxLiabilityGrossNoncurrent" name="DeferredTaxLiabilityGrossNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_MulticloudLimitedMember" name="MulticloudLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZhuHaiHengQinNewAreaMember" name="ZhuHaiHengQinNewAreaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PayableToOnlineAdvertisingPlatformsAsAgency" name="PayableToOnlineAdvertisingPlatformsAsAgency" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_HkZoomBusinessMember" name="HkZoomBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ShortTermInvestmentsTextBlock" name="ShortTermInvestmentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_KingsoftJapanIncMember" name="KingsoftJapanIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_IncomeTaxReconciliationPRCWithholdingTaxPercent" name="IncomeTaxReconciliationPRCWithholdingTaxPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ResearchAndDevelopment" name="ResearchAndDevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock" name="ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_SellingAndMarketingExpensesPolicyTextBlock" name="SellingAndMarketingExpensesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ReceivableFromThirdPartyPaymentPlatformCurrent" name="ReceivableFromThirdPartyPaymentPlatformCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsModifiedNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ScheduleOfIntangibleAssetsUsefulLifeTableTextBlock" name="ScheduleOfIntangibleAssetsUsefulLifeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_AdditionalInvestmentInAcquiree" name="AdditionalInvestmentInAcquiree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_DeferredTaxAssetsTaxDeferredExpenseOtherNonCurrent" name="DeferredTaxAssetsTaxDeferredExpenseOtherNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_BeijingKingsoftCheetahTechnologyCoMember" name="BeijingKingsoftCheetahTechnologyCoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BeijingKingsoftInternetSecuritySoftwareCoLtdMember" name="BeijingKingsoftInternetSecuritySoftwareCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_NewsRepublicSoftwareTechnologyCoLtdMember" name="NewsRepublicSoftwareTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AllowanceForDoubtfulAccountsReceivableReInfluenceOfBusinessAcquisition" name="AllowanceForDoubtfulAccountsReceivableReInfluenceOfBusinessAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_LoansGrantedToNomineeShareholdersAndViesByPrimaryBeneficiaries" name="LoansGrantedToNomineeShareholdersAndViesByPrimaryBeneficiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_MezzanineEquityAbstract" name="MezzanineEquityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PercentageOfEquityInterestHeldBeforeAcquisition" name="PercentageOfEquityInterestHeldBeforeAcquisition" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_CheetahMobileSealIncMember" name="CheetahMobileSealIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ConewNetworkTechnologyBeijingCoLtdMember" name="ConewNetworkTechnologyBeijingCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_PlatformMember" name="PlatformMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree" name="BusinessCombinationConsiderationTransferredSettlementOfAmountDueToAcquiree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_ContributionFromRedeemableNoncontrollingInterests" name="ContributionFromRedeemableNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_PercentageOnAdditionalEquitySharesAcquired" name="PercentageOnAdditionalEquitySharesAcquired" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_CheetahIntelligenceHongKongLimitedMember" name="CheetahIntelligenceHongKongLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAndImpairmentCumulativeAmount" name="EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAndImpairmentCumulativeAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_PercentageOfDlomDecreasesincreaseInFairValueOfTheInvestments" name="PercentageOfDlomDecreasesincreaseInFairValueOfTheInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_EquityIncentivePlansMember" name="EquityIncentivePlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_DilutiveSecuritiesEffectOnShareBasedAwardsDilutedEarningsPerShare" name="DilutiveSecuritiesEffectOnShareBasedAwardsDilutedEarningsPerShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="cmcm_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock" name="AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_FourteenEquityInvesteesMember" name="FourteenEquityInvesteesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_copyOfTechnologyMember" name="copyOfTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect" name="AllowanceForDoubtfulAccountsReceivableForeignExchangeEffect" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_OtherNonOperatingExpenses" name="OtherNonOperatingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesAmount" name="EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossesAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="cmcm_MaximumOwnershipPercentageInICP" name="MaximumOwnershipPercentageInICP" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfOrdinarySharesPercentage" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfOrdinarySharesPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_PercentageOfCargDecreasesIncreaseInFairValueOfTheInvestments" name="PercentageOfCargDecreasesIncreaseInFairValueOfTheInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_GamingAndUtilityRelatedbusinessesMember" name="GamingAndUtilityRelatedbusinessesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_ZhuhaiJuntianElectronicTechnologyCoLtdMember" name="ZhuhaiJuntianElectronicTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cmcm_LongTermInvestmentsPolicyTextBlock" name="LongTermInvestmentsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_PercentageOfCargmIncreasesDecreaseInFairValueOfTheInvestments" name="PercentageOfCargmIncreasesDecreaseInFairValueOfTheInvestments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="cmcm_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock" name="FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
