v3.26.3
Cover
 12 Months Ended
Jun. 30, 2026
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Financial Statement Error Correction [Flag] true
Document Shell Company Report false
Entity Interactive Data Current Yes
Document Accounting Standard U.S. GAAP
Amendment Flag false
Document Period End Date Jun. 30, 2026
Document Fiscal Year Focus 2026
Document Fiscal Period Focus FY
ICFR Auditor Attestation Flag false
Entity Registrant Name BIG TREE CLOUD HOLDINGS LIMITED
Entity Central Index Key 0001999297
Current Fiscal Year End Date --06-30
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Non-accelerated Filer
Entity File Number 001-42114
Entity Shell Company false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One Building B4
Entity Address, Address Line Two Qianhai Shengang Fund Town
Entity Address, Address Line Three Nanshan District
Entity Address, City or Town Shenzhen
Entity Address, Country CN
Entity Address, Postal Zip Code 518052
Document Financial Statement Restatement Recovery Analysis [Flag] false
Class A ordinary shares, par value US$0.002 per share  
Document Information [Line Items]  
Trading Symbol DSY
Title of 12(b) Security Class A ordinary shares, par value US$0.002 per share
Security Exchange Name NASDAQ
Warrants to purchase Class A ordinary shares  
Document Information [Line Items]  
Trading Symbol DSYWW
Title of 12(b) Security Warrants to purchase Class A ordinary shares
Security Exchange Name NASDAQ
Class A Ordinary Shares  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 1,251,873
Class B Ordinary Shares  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 3,500,000
Business Contact  
Document Information [Line Items]  
Contact Personnel Name Wenquan Zhu
Contact Personnel Email Address zhuwenquan@bigtreeclouds.com
Entity Address, Address Line One Building B4
Entity Address, Address Line Two Qianhai Shengang Fund Town
Entity Address, Address Line Three Nanshan District
Entity Address, City or Town Shenzhen
Entity Address, Country CN
Entity Address, Postal Zip Code 518052
City Area Code +86
Local Phone Number 0755 2759-5623