In order to improve the machinability and electrical performance of Ag/SnO2 electrical contact materials, a new kind of nano-Ag/SnO2/CeO2 electrical contact materials was designed with Ag as the matrix, SnO2 as the wild phase, and CeO2 as the additive. First, nano-SnO2/CeO2 composite powders were prepared by a liquid phase in-situ chemical route. The influence of rare earth oxide CeO2 on the microstructure and the phase composition of SnO2/CeO2 were analyzed by microstructure analysis methods. Then, the new nano-Ag/SnO2/CeO2 contact materials were prepared by powder metallurgy technology. The physical and mechanical properties, temperature rise, connecting and breaking capability of the contact terminal were tested. The results show that the electrical performances of Ag/SnO2/CeO2 materials are superior to those of the existing Ag/SnO2 materials