Wettability reflects the physical properties of AgSnO2 contact materials.Improving the wettability will directly affect the electrical contact performance of AgSnO2 contact materials.What’s more, doping with different additives can alter the wettability of the AgSnO2 contact material . In this paper, TiO2, La2O3, Bi2O3 three kinds of additives were chosen.Each additive was selected from seven different proportions, and the wettability of AgSnO2 contact material was measured.The results showed that the wetting angle of silver to oxide was different from the same time.What’s more,the influence of the same type of additives on the wettability of AgSnO2 contact material has a direct relationship with the addition content.In order to further verify,electrical properties of the contact materials for AgSnO2 and three kinds of additives were tested.The experimental results showed that the variation of contact resistance is basically consistent with the change of wettability.