With the rapid development of the electrification of vehicles, Xbywire technology has been a major subject in the field of automotive electronics research. To build up an appropriate brakebywire system model, it has greatly significance to improve the system safe, reliability and strengthen the realtime and also push the progress on the research and design level of the brakebywire system. In the braking process of brakes, For hardware and software, there are five FlexRay communication nodes, including designation of PCB, hardware circuit debugging, designation of software and using of the experimental car’s platform to execute the order whether the car can brake smoothly. Experiments show that the brakebywire system can satisfy the national standard of braking performance requirements to ensure the system running safely and reliably.