A new type of ZnSn(OH)6/SrSn(OH)6 composite photocatalyst was prepared by a simple co-precipitation method. The structure, morphology and light absorption properties of the samples were characterized by XRD, XPS, UV-Vis, N2 adsorption and desorption, scanning electron microscope(SEM), transmission electron microscope(TEM). Its photocatalytic performance was evaluated by toluene target pollutant. The results show that compared with the pure phase SrSn(OH)6 and ZnSn(OH)6, the composite material ZnSn(OH)6/SrSn(OH)6 has significantly enhanced ultraviolet light absorption capacity, and the recombination efficiency of photogenerated carriers reduce. Furthermore, the efficiency of photocatalytic degradation of toluene is enhanced. The degradation rate of toluene in the composite sample ZSH/SSH-10(molar ratio is 10%) is more than 58%, which is 1.35 times that of SrSn(OH)6 monomer. The degradation of toluene for ZSH/SSH-10 catalyst is still 51% after recycling 5 times, indicating that the catalyst has good recycling stability.SHAYEGAN Z, LEE C S, HAGHIGHAT F. TiO2 photocatalyst for removal of volatile organic compounds in gas phase - A review［J］. Chemical Engineering Journal, 2018, 334: 2408-2439.