Abstract: The surface of copper alloy was modified using infiltration casting. Fe-based alloy powder was used as infiltrated agent under the condition of negative pressure to form the infiltrated layer on the surface of copper cast . The experimental results show that the surface composites of copper matrix are obtained under the present condition , whose structureis different from that of the substrate. The SEM shows that the interface between the base metal and the penetrated layercontains no exist holes and the structure is compact . Infiltration casting is feasible to fabricate the surface composite of acopper substrate.