Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Cleantech Solutions International, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jianhua Wu, chief executive officer of the Company, and I, Wanfen Xu, chief financial officer of the Company, certify, pursuant to 18 U.S.C. section 1350 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:  March 30, 2016	By:	/s/ Jianhua Wu
		Jianhua Wu Chief Executive Officer

Dated:  March 30, 2016	By:	/s/ Wanfen Xu
		Wanfen Xu Chief Financial Officer and Principal Financial and Accounting Officer