Carbon nanotube (CNT) with carboxyl functional groups and flake Cu-Cr powder were used as raw materials.The surface of flake Cu-Cr powder was treated by hydrophilic functional groups,and the CNT/Cu-Cr matrix composites were prepared by wet dispersion and powder metallurgy process,realizing the uniform dispersion of carbon nanotube in the Cu-Cr matrix.The microstructure of the composite block was observed by field emission scanning electron microscope,and the effects of CNT and Cr content on the mechanical and electrical properties of the composites were studied.The results showed that the optimal system was the composites containing CNT with a volume fraction of 2% and Cr with a mass fraction of 3% in the alloy powder (2% CNT/Cu-3Cr).In comparison with the Cu-3Cr bulk,the yield strength increased by about 12%,the tensile strength increased by about 13%,the friction coefficient decreased by about 19% and the electrical conductivity decreased by about 23%.