Abstract: Polyacrylic acid samarium/epoxy resin composite material was prepared for radiation-protection via graft copolymerization route induced by gamma radiation. The samples under different dose and samples of different metal concentration were studied. The radiation-shielding abilities of Sm and Pb were compared. The composite material’s microstructures were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDAX). Mechanical property of the material was also tested and analyzed. Gamma energy spectrum system and GammaVision software were used to calculate its radiation shielding property. The results indicate that the mechanical property of material is better than that of pure epoxy resin. The suitable dose for the process of inducing gamma irradiation is 50 kGy. For the low energy photon, the radiation-shielding ability of element Sm is better than that of element Pb.