[FORM 10-Q (Mark One) x For the quarterly period ended March 31, 2012 o For the transition period from __________ to __________ CLEANTECH SOLUTIONS INTERNATIONAL, INC. DELAWARE 74-2235008 (State or other jurisdiction of (I.R.S. Employer incorporation of organization) Identification No.) No. 9 Yanyu Middle Road Qianzhou Township, Huishan District, Wuxi City Jiangsu Province, China 150090 (86) 51083397559 x o x] [SARBANES-OXLEY ACT OF 2002 I, Jianhua Wu, certify that: 1. I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under] [CERTIFICATION OF PRINCIPAL FINANCIAL AND ACCOUNTING OFFICER SARBANES-OXLEY ACT OF 2002 I, Wanfen Xu, certify that: 1. I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International, Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements] [18 U.S.C. SECTION 1350, SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (1) (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Jianhua Wu Chief Executive Officer Wanfen Xu Chief Financial Officer (Principal Accounting Officer) EX-32.1 4 f10q0312ex32i_cleantech.htm CERTIFICATION]

[FORM 10-Q (Mark One) x For the quarterly period ended March 31, 2012 o For the transition period from __________ to __________ CLEANTECH SOLUTIONS INTERNATIONAL, DELAWARE 74-2235008 (State or other jurisdiction of (I.R.S. Employerorporation of organization) Identification No.) No. 9 Yanyu Middle Road Qianzhou Township, Huishan District, Wuxi City] [SARBANES-OXLEY ACT OF 2002 I, Jianhua Wu, certify that: 1.I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International,; 2.Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances] [CERTIFICATION OF PRINCIPAL FINANCIAL AND ACCOUNTING OFFICERRBANES-OXLEY ACT OF 2002 I, Wanfen Xu, certify that: 1.I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International,; 2.Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements] [18 U.S.C. SECTION 1350, SECTION 906 OF THERBANES-OXLEY ACT OF 2002 (1) (2) The informationntained in the Report fairly presents, inl material respects, the financialndition and results of operations of thempany. Jianhua Wu ChiefExecutive Officer Wanfen Xu ChiefFinancial Officer (Principal Accounting Officer) CERTIFICATION f10q0312ex32i_cleantech.htm 4 EX-32.1]

[FORM 10-Q (Mark One) x For the quarterly period ended March 31, 2012 o For the transition period from __________ to __________ CLEANTECH SOLUTIONS INTERNATIONAL, DELAWARE 74-2235008 (State or other jurisdiction of (I.R.S. Employerorporation of organization) Identification No.) No. 9 Yanyu Middle Road Qianzhou Township, Huishan District, Wuxi City] [SARBANES-OXLEY ACT OF 2002 I, Jianhua Wu, certify that: 1.I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International,; 2.Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances] [CERTIFICATION OF PRINCIPAL FINANCIAL AND ACCOUNTING OFFICERRBANES-OXLEY ACT OF 2002 I, Wanfen Xu, certify that: 1.I have reviewed this quarterly report on Form 10-Q of Cleantech Solutions International,; 2.Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements] [18 U.S.C. SECTION 1350, SECTION 906 OF THERBANES-OXLEY ACT OF 2002 (1) (2) The informationntained in the Report fairly presents, inl material respects, the financialndition and results of operations of thempany. Jianhua Wu ChiefExecutive Officer Wanfen Xu ChiefFinancial Officer (Principal Accounting Officer) CERTIFICATION f10q0312ex32i_cleantech.htm 4 EX-32.1]