Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 30, 2016	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Cleantech Solutions International, Inc.,
Entity Central Index Key	0000819926
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2015
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 7,206,000
Entity Common Stock, Shares Outstanding		4,403,986