BiVO4 and BiVO4/Sepiolite (Sep) were prepared by hydrothermal method, and Ag/ BiVO4/Sep composite photocatalysts with different Ag loadings were prepared under the light using AgNO3 as a precursor reagent. XRD, DRS and other testing methods were used to characterize the phase, morphology and optical properties of the photocatalyst. Using rhodamine B as a model pollutant, the effects of different Ag loadings on the performance of Ag/BiVO4/Sep composite photocatalysts were investigated. The results show that when the loading of Ag reaches 60%, the composite photocatalyst has the best decolorization effect on rhodamine B, and the rhodamine B can be completely decolorized within 10 minutes. At the same time, the 0.6Ag / BiVO4 / Sep sample has a certain cyclic stability and can be used multiple times.