Improvement and enhancement of wear resistance of TC4 alloy surface is one of the key technology to be used as tubing materials. Cu coating on TC4 alloy surface was prepared by the electroplating technology of sulfate. The tribological and wear properties of TC4 alloy substrate and Cu coating were investigated. The morphologies of the wear scars, wear rate and friction coefficient were analyzed by SEM, EDS and STM, and the wear mechanism was discussed. The results show that the Cu plating on TC4 alloy can greatly improve and enhance its wear resistance, and the wear resistance of the Cu plating is obviously better than that of TC4 alloy substrate. The wearing track of TC4 alloy is of the furrow morphology, and its wear mechanism is delamination abrasion and adhesive abrasion. The wearing track of Cu plating shows the morphology of plastic deformation caused by adherent copper debris being pressed, and its wearing mechanism includes delamination abrasion and fatigue abrasion.