Tinned copper clad aluminum is made by coveering a coating of tin on the surface of copper clad aluminum wire by hot dip method, which is made up by using pure aluminum wire as core. It adopts the advanced coating and welding technology in the world. Plating copper concentrically on the concentric line of aluminum, realizes metaliurgy combination between copper coating and aluminum. There will be no flaking off during the heat treatment or mechanical workout. The TCCA is a best new clad metal wire instead of pure copper wire.