Ag₃PO₄/Fe₃O₄/GO composite photocatalysts were prepared via co precipitation and ion exchange method using graphene oxide (GO) as a carrier, which were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetry (TGA), vibrating sample magnetometer(VSM) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS)．The results of photocatalytic decolorization indicated that the Ag₃PO₄/Fe₃O₄/GO mposite photocatalysts showed better photocatalytic decolorization of Rhodamine B (97.6%) than that of pure Ag₃PO₄ (73.4%) . The introduction of sodium persulfate into the Ag₃PO₄/Fe₃O₄/GO tocatalytic system could enhance the photocatalytic performance. In addition, Ag₃PO₄/Fe₃O₄/GO posite catalyst exhibited good activity stability, thermal stability and structural stability.