Abstract: Different mass fractions of organic modified attapulgite powder scattered into the base oil as additive were added into lithium grease during the 3# grease preparation. The amount of attapulgite and the friction reduction, anti-wear and self-repairing properties of the lithium grease were evaluated using a SRV friction wear machine. As a comparison, the tribological properties of base lithium grease were also investigated. Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) were employed to analyze the worn surface topography and the elements on the worn surface. The results show that after adding different amount of modified attapulgite into lithium grease, the friction coefficient and the wear rates of the grease decline in different extent. When 0.8% attapulgite is added, the results are the best. The worn surface lubricated with grease containing attapulgite is smoother more than that lubricated with blank one and there were no obvious wear characteristics. There is a repairing film formed on the worn surface, which is different from substrate material and contains C, Fe, Si, Mg, O and Al elements.