In order to solve the defects caused by the wear and corrosion of the slurry pump impeller, such as short life and poor reliability. In this paper, the numerical analysis of the wear characteristics of the slurry pump impeller was carried out by Fluent software. The main wear zone is inlet and outlet pressure surfaces of the blade, which is basically consistent with the actual wear. Combined with the wear resistance and corrosion resistance of ceramic coating，the surface sample of the high-chromium cast iron-base AT13 ceramic coating was prepared by cold spraying method. The test results show that the microhardness of the coating is 1020HV; the loss quality of the coating sample is only 5.1mg; X-ray diffraction analysis shows that the coating has good bonding with the matrix; and the average porosity is 1.25%. The surface hardness and wear resistance of the coating sample is higher than that of the high chromium cast iron. The coating quality is good. The coating process can provide technical reference for the protection of the slurry pump impeller.