The conductivity of zinc clad steel grounding round wire is 2.5 times that of steel, which greatly improves the conductivity of the wire and ensures the function of grounding and current drain. As the surface of zinc clad steel grounding round wire covered with a certain thickness of zinc layer, in the environmental corrosion process, the zinc layer as a sacrificial anode body, can effectively protect the iron devices in the ground network, play the role of cathodic protection.