An outstanding UV shielding agent based on graphene oxide modified ZnO/CeO2 nanocomposites was prepared by sol-gel method using zinc nitrate hexahydrate，ceric nitrate hexahydrate and graphene oxide（GO） as raw materials.The structure，composition and morphology of the as prepared sample were characterized by X ray diffraction（XRD），scanning electron microscopy（SEM），Fourier transform infrared spectroscopy（FT-IR） and ultraviolet and?visible spectrophotometry（UV Vis）.The influences of molar ratio of cerium oxide to zinc oxide，mass of graphene oxide，amount of shielding agent loaded and pH value on the UV shielding performance of the GO/ZnO/CeO2 nanocomposites were investigated.The average sizes for GO，CeO2 and ZnO in the graphene oxide modified ZnO/CeO2 nanocomposites were 8.3，15.4 and 37.5 nm，respectively.The optimum conditions were as follows: pH value: 6.0，molar ratio of cerium oxide to zinc oxide: 4 ∶ 1，mass of graphene oxide: 2.0 g，amount of shielding agent loaded: 0.06 g/L.Under the optimal conditions，the sequence for UV shielding performances of the agents were as follows: graphene oxide modified ZnO/CeO2 nanocomposites>GO>ZnO/CeO2 nanocomposites>CeO2>ZnO.