In this paper, the effect of different contents of WC (tungsten carbide) particles on the mechanical and electrical properties of graphite-copper materials was systematically investigated. The composites containing different contents of WC particles were prepared by powder metallurgical method and their properties were evaluated. The experimental results show that the hardness, wear resistance, and electrical conductivity of the composites show an increasing trend with the increase of WC content from 1% to 3%, and the performance of the composites shows a decreasing trend with the increase of WC content from 4% to 5%, and the composites reach the optimum comprehensive performance when the WC content reaches 3%, with the hardness of 18.5 HV, the coefficient of friction of 0.132, and the electrical conductivity of 4.69 × 105 S/cm. This is mainly attributed to the diffuse reinforcement of WC particles in the graphite-copper matrix and the generation of a transition phase linking graphite and copper.