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Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2021
Nov. 10, 2021
Document Information Line Items    
Entity Registrant Name IT TECH PACKAGING, INC.  
Trading Symbol ITP  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   99,049,900
Amendment Flag false  
Entity Central Index Key 0001358190  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-34577  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 20-4158835  
Entity Address, Address Line One Science Park, Juli Rd, Xushui District  
Entity Address, City or Town Baoding City  
Entity Address, Address Line Two Hebei Province  
Entity Address, Country CN  
Entity Address, Postal Zip Code 072550  
City Area Code 011  
Local Phone Number (86) 312-8698215  
Title of 12(b) Security Common Stock, par value $0.001  
Security Exchange Name NYSE  
Entity Interactive Data Current Yes