In order to further improve the hardness and high temperature friction and wear properties of copper-based self-lubricating composites,La2O3 particles were introduced into the Cu-graphene-WS2 composite by powder metallurgy hotpress sintering method.The friction and wear properties of Cu-graphene-WS2 composite and La2O3 reinforced Cu-graphene-WS2 composite at different temperatures were obtained.The results show that the component in the composites does not decompose or react with each other and is distributed uniformly in the matrix after sintering.The structure of the composites is relatively dense,the addition of La2O3 reinforcing phase can improve the hardness and reduce the thermal conductivity of the composites.At room temperature,the friction coefficient and wear rate of the two composites are similar.At high temperature,friction and wear properties of Cu-graphene-WS2 are decreased duo to the oxidation of graphene and WS2,while La2O3 reinforced Cu-graphene-WS2 composite has better high temperature friction and wear properties because