With the development of the automobile industry, the improvement of vehicle speed, the increase of load and the improvement of people's demand for driving experience have put forward higher requirements for braking performance, an excellent braking system should be able to maintain stable braking efficiency in a variety of complex and harsh conditions. Therefore, in this paper, the most basic mechanical transmission of automobile braking system is discussed in depth, the specific paths and methods to improve the braking performance are expounded from the dimensions of structural optimization design, high-performance material application and electromechanical cooperative control, aiming to provide reference for the optimization of related technologies.