Nowadays, the development of automotive electronic technology is getting faster and faster. The traditional automotive bus system can no longer meet the reliability requirements of high-speed transmission in automobiles. With the emergence of automotive electronic control units (ECUs), large-capacity data information to be shared between multiple subsystems The requirements are getting higher and higher, and the real-time and reliability requirements for the information transmission of the automobile control system are also getting higher and higher. The current popular automotive bus network consists of LIN bus and can bus network and the latest FlexRay bus network, while the vehicle Ethernet bus network is only mentioned, and there is no vehicle Ethernet at present.