Nano-Mo-La2O3 power with the average grain size being about sixty nanometers was prepared by the sol-gel. Mo-La2O3 electrical contact material was fabricated by hot pressure sintering. It is found that the electrical contact material is uniform, La2O3 particles were distributed around the grain boundary or in the crystal, and the average grain size of the particles are mostly less than one hundred nanometer. After breakdown tests, the breakdown points distribute around the whole face, the electron erosion is shallow, and the electron erosion firstly occurred in the La2O3 phase.