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Cover
 12 Months Ended
Dec. 31, 2024
shares
Entity Addresses [Line Items]  
Document Type 20-F/A
Amendment Flag true
Amendment Description CDT Environmental Technology Investment Holdings Limited (the “Company) is filing this Amendment No. 1 (this "Amendment") to the Annual Report on Form 20-F for the fiscal year ended December 31, 2024, as filed with the Securities and Exchange Commission (the "SEC") on May 15, 2025 (the "Original Form 20-F"). This Amendment is being filed for the sole purposes of (i) revising the opinion of the auditor to remove an inadvertent reference to auditing standards generally accepted in the United States of America and (ii) filing the certifications in the form of Exhibits 12.1, 12.2, 13.1 and 13.2 (the "Certifications"), respectively. The Certifications were inadvertently not included in the Original Form 20-F and are now dated concurrently with this Amendment.   This Amendment is being filed solely to address the revisions as set out above. No other changes have been made to the Original Form 20-F. This Amendment speaks as of the original filing date of the Original Form 20-F, does not reflect events that may have occurred subsequent to the original filing date and does not modify or update in any way disclosures made in the Original Form 20-F. Accordingly, this Amendment should be read in conjunction with the Original Form 20-F and the Company's other filings made with the SEC subsequent to the filing of the Original Form 20-F.
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Document Period End Date Dec. 31, 2024
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2024
Current Fiscal Year End Date --12-31
Entity File Number 001-42007
Entity Registrant Name CDT Environmental Technology Investment Holdings Limited
Entity Central Index Key 0001793895
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One C1, 4th Floor, Building 1
Entity Address, Address Line Two Financial Base, No. 8 Kefa Road
Entity Address, Address Line Three Nanshan District
Entity Address, City or Town Shenzhen
Entity Address, Country CN
Entity Address, Postal Zip Code 518057
Title of 12(b) Security Ordinary Shares, par value $0.0025 per share
Trading Symbol CDTG
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 10,825,000
ICFR Auditor Attestation Flag false
Document Financial Statement Error Correction [Flag] false
Auditor Firm ID 6907
Auditor Name Enrome LLP
Auditor Location Singapore
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One C1, 4th Floor, Building 1
Entity Address, Address Line Two Financial Base, No. 8 Kefa Road
Entity Address, Address Line Three Nanshan District
Entity Address, City or Town Shenzhen
Entity Address, Country CN
Entity Address, Postal Zip Code 518057
Country Region 86
City Area Code 0755
Local Phone Number 86667996
Contact Personnel Name Yunwu Li
Contact Personnel Email Address liyunwu@cdthb.cn