Wire harness is the main body of automobile circuit network. Without wire harness, there will be no automobile circuit. Wire harness refers to the contact terminal (connector) made of copper and crimped with wire and cable, and then molded and pressed insulator or external metal shell to bind the wire harness to form a component connecting the circuit. The wire harness industry chain includes wire and cable, connector, processing equipment, harness manufacturing and downstream application industries. The harness is widely used in automobiles, household appliances, computers and communication equipment, various electronic instruments and meters, etc. the body harness connects the whole body in an H-shape.