As a bridge connecting the pile and the vehicle, the charging cable briefly introduces the characteristics and differences between TPU and TPE. The English name of TPU is the abbreviation of thermoplastic polyurethane. The main characteristics of TPU are: a wide range of hardness, and with the increase of hardness, its products still maintain good elasticity and wear resistance, high mechanical strength, outstanding cold resistance, good processing performance, oil, water and mold resistance, and good recovery and utilization. Under the condition of high hardness, the elastic loss of TPE is greater than that of TPU. TPE English name is the abbreviation of thermoplastic elastomer, which means thermoplastic elastomer. It has the characteristics of environmental protection, non toxicity, safety, wide hardness range, good coloring, soft feel, weather resistance, fatigue resistance, high temperature resistance and so on. It can be recycled and reduce costs. At present, the insulation and protection materials of automobile harness with temperature grade of 105 and below are mostly PVC materials. PVC materials for domestic automobile harness often have some disadvantages, such as rough extrusion surface and poor low-temperature performance. In view of this, combined with the special environment of automobile harness (such as narrow space, poor heat dissipation, frequent mutual friction, etc.), special requirements (thin wall, high-speed extrusion, etc.) and cost control requirements, it is necessary to study the PVC material for automobile harness to further improve its performance.