Visible light photo catalyst CuInS2 material was prepared vasa one-step solvothermal method. The crystal structure, surface morphology and specific surface area of the materials were characterized and analyzed by XRD,SEM,BET respectively. The effects of Cu/In motor ratio, temperature, time and trapping agent types of precursor liquid were explored on the performance of CuInS2 photocatalytic reduction of U in solution under visible fight. The results showed that when Cu : In= 1 : 1, the sample preparation temperature Is 200, and the preparation time Is 12 h, the prepared CuInS2 material has the best photocatalytic reduction activity for U(( ), the removal rate of n the solution Is 87. 8%,and the removal amount is 12. 1 mg/g. The main active substances m the photocatalytic reduction process are 02 and e . [ABSTRACT FROM AUTHOR]