v3.26.1
Cover
 12 Months Ended
Sep. 30, 2025
$ / shares
shares
Entity Addresses [Line Items]  
Document Type 20-F/A
Amendment Flag true
Amendment Description Leishen Energy Holding Co., Ltd. (the “Company”) is filing this Amendment No. 1 on Form 20-F/A (this “Form 20-F/A”) to amend its Annual Report on Form 20-F for the year ended September 30, 2025 filed with the U.S. Securities and Exchange Commission (the “SEC”) on January 30, 2026 (the “Original Filing”). The Company is filing this Form 20-F/A to amend Item 15 to provide management’s annual report on internal control over financial reporting, and Note 20 – Segment Information in the Notes to the Consolidated Financial Statements in the Original Filing. This Form 20-F/A also includes updated certifications in the exhibits as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended, from the Company’s Chief Executive Officer and Chief Financial Officer, dated as of the date of filing of this Form 20-F/A.   Except as described above, no other information or exhibit included in the Original Filing is being amended or updated by this Form 20-F/A and, other than as described herein, this Form 20-F/A does not purport to reflect any information or events subsequent to the Original Filing. This Form 20-F/A continues to describe the conditions as of the date of the Original Filing and, except as expressly contained herein, we have not updated, modified or supplemented the disclosures contained in the Original Filing. Among other things, forward-looking statements made in the Original Filing have not been revised to reflect events, results, or developments that have occurred or facts that have become known to us after the date of the Original Filing, and such forward-looking statements should be read in their historical context.   Accordingly, this Form 20-F/A should be read in lieu of the Original Filing and in conjunction with our filings with the SEC subsequent to the Original Filing.  
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Document Period End Date Sep. 30, 2025
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2025
Current Fiscal Year End Date --09-30
Entity File Number 001-42445
Entity Registrant Name Leishen Energy Holding Co., Ltd.
Entity Central Index Key 0001985139
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 103 Huizhong Li, B Building, Peking Times Square, Unit 15B10
Entity Address, Address Line Two Chaoyang District
Entity Address, City or Town Beijing
Entity Address, Country CN
Entity Address, Postal Zip Code 00-0000000
Title of 12(b) Security Class A Ordinary Shares, par value US$0.001 per share
Trading Symbol LSE
Security Exchange Name NASDAQ
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Entity Common Stock, Shares Outstanding | shares 17,025,000
Entity Listing, Par Value Per Share | $ / shares $ 0.001
Document Financial Statement Error Correction [Flag] false
Auditor Firm ID 2388
Auditor Name Wei, Wei & Co., LLP
Auditor Location Flushing, New York
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 103 Huizhong Li, B Building, Peking Times Square, Unit 15B10
Entity Address, Address Line Two Chaoyang District
Entity Address, City or Town Beijing
Entity Address, Country CN
Entity Address, Postal Zip Code 00-0000000
City Area Code 86
Local Phone Number 10-84871799
Contact Personnel Name Zhiping Yu, Chief Financial Officer
Contact Personnel Email Address ir@r-egroup.com