Abstract: Cu/graphite composites were prepared by the hot pressing sintering and the effect of friction environments on the friction and wear behaviors was investigated. The results show that the friction and wear properties of Cu/graphite composites are significantly affected by friction environment. The friction coefficient is the smallest in dry friction（0.15）, the second in seawater（0.29） and the largest in deionized water（0.46）. However, the wear rate shows different trends, the wear rate in seawater is the smallest(7.09 ×10^-14m³/N·m), the second in dry friction(1.09×10^-13m³/N·m) and the largest in deionized water(5.37×10^-13m³/N·m). Compared with the friction in deionized water, the lubricating film is formed when the material wears the surface when the dry friction and seawater. The friction coefficient and wear rate of Cu/graphite composites are significantly reduced. Under the friction of deionized water environment, it is difficult to form a film on the wear surface of the material, so the friction coefficient and wear rate of the material are obviously large.