In order to improve and stabilize the friction coefficient and wear resistance of copper based powder metallurgy friction material,Copper matrix composite was fabricated by powder metallurgy method with B4C as friction component.The effects of B4C content on friction and wear properties of copper matrix composite were investigated.The results demonstrate that hardness of Cubased friction materials is increased and the density is decreased with the increasing of B4C weight content.The friction coefficient of the materials is increased and the wear extent is decreased firstly,and then increased with the increasing of B4C weight content.The Cubased friction materials with 6% weight content of B4C have the best mechanical and friction properties.The strengthening effect of B4C particles improves the deformation resistance of the materials,and the hardness of the sintered materials is improved.In the process of friction,B4C particles play a role in resisting the surface ploughing effect of coupled pair,and improve the wear resistance of the materials.