The compactness of friction film can be improved by MgO.The oxidation resistance and tribological properties can also be improved by ZnO.Conductive silicon grease were prepared by using polytetrafluoroethylene as thickening agent,polydimethylsiloxane as base oil,different contents of MgO and ZnO as additives.The dropping point,volume resistivity and tribological properties of the silicone grease were tested.The results show that both MgO and ZnO can improve the dropping point and conductivity of the silicone grease.The dropping point of silicone grease with ZnO is higher than that with MgO,and its volume resistivity is lower than that with MgO.Both additives can reduce the friction coefficient of silicone grease,and MgO has better antiwear and friction reducing performance.XPS analysis results show that chemical film containing Fe,Zn and Mg elements can be formed on the friction surface,which can fill the wear scar surface and play a role in antiwear and friction reducing.