Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Mar. 25, 2012	Jun. 30, 2011
Document and Entity Information [Abstract]
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2011
Entity Well-Known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Registrant Name	Cleantech Solutions International, Inc.,
Entity Central Index Key	0000819926
Entity Public Float			$ 11,828,762
Entity Common Stock, Shares Outstanding		2,294,014
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Document Type	10-K