With the continuous development and improvement of economic society and people's living standards, automobiles have entered thousands of households and become an indispensable means of transportation for daily life and economic development. With the continuous improvement of automobile power and fuel economy indicators, people also pay more attention to the handling of automobiles. Although the suspension system has a simple structure, it has a certain impact on the handling stability, driving smoothness and riding comfort of the car. Therefore, suspension is an important part of automotive design.