Abstract:MoCe alloys were prepared by solid-liquid spray doping technology and powder metallurgy method. ICP, SEM, universal testing machine and other means were used to determine the chemical composition of the alloy powder, the fracture characteristics and microstructure of the alloy, and to study the influence of different contents of rare earth oxide CeO2 on the performance of molybdenum alloy. The results show that the sintering density of MoCe alloy increases with the increase of cerium oxide content, and the density of the alloy is all above 9.80 g/cm3. When the doping amount of CeO2 is less than 0.3%, the grain size of sintered rod decreases with the increase of CeO2 content. When the doping amount of CeO2 is higher than 0.3%, the grain size does not change significantly. ? 1.8 mm MoCe wire room temperature strength and elongation than pure molybdenum wire has increased significantly, peaked when CeO2 content in 0.3%, and the tensile fracture at present a typical ductile fracture morphology.