In order to realize the distributed, modular and intelligent design concept of the braking system of the next generation electric locomotive, the brake display screen based on CAN bus communication was developed. The software design of the brake display was based on the embedded Linux operating system, which adopted Qt Creator, a cross-platform integrated development environment, using design methods such as Qt designer, signal and slot mechanism, SQLite database and multithreading technology. The self-developed brake display realized the function of configuring, monitoring and maintaining the braking system with friendly and simple interfaces. For the cross-platform porting characteristics of Qt program, the completion of this design is of reference for the development of display software on other platforms.