v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 13, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Information [Line Items]    
Entity Registrant Name GREENLAND TECHNOLOGIES HOLDING CORPORATION  
Entity Central Index Key 0001735041  
Entity File Number 001-38605  
Entity Tax Identification Number 01-0038605  
Entity Incorporation, State or Country Code D8  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 50 Millstone Road  
Entity Address, Address Line Two Building 400 Suite 130  
Entity Address, City or Town East Windsor  
Entity Address, State or Province NJ  
Entity Address, Country US  
Entity Address, Postal Zip Code 08512  
Entity Phone Fax Numbers [Line Items]    
City Area Code 1 (888)  
Local Phone Number 827-4832  
Entity Listings [Line Items]    
Title of 12(b) Security Ordinary shares, no par value  
Trading Symbol GTEC  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   20,532,482