A series of CdS/YFeO3 composite magnetic photocatalysts were synthetized by co-precipitation method using cadmium nitrate, dimethyl sulfoxide, antimony trioxide, nitric acid, ferric nitrate and citric acid as raw materials. They were characterized by techniques of TG-DTA, UV-vis diffuse reflection, FL, XRD and UV-vis. The XRD results indicate that the CdS/YFeO3 composite magnetic photocatalysts are successfully prepared. The TG-DTA results indicate that the thermal stability of CdS/YFeO3 composite magnetic photocatalysts is higher than that of pure CdS. The UV-vis diffuse reflection results indicate that the absorbance of the composite magnetic photocatalysts is higher than that of pure CdS in ultraviolet-visible region. The photocatalytic activity of the photocatalysts is tested in degradation of rhodamine B visible light irradiation. The results show that the ratio of CdS/YFeO3 significantly affects the photocatalytic activity. The reusability results of photocatalytic experiments show that the CdS/YFeO3 composite photocatalysts can be easily recovered, and the recovery rate for the first cycle is 92.08%. Keywords: CdS; YFeO3; Co-precipitation; Composite magnetic photocatalyst; catalyst regeneration