Abstract: Human-machine interface system is an important part of train control and monitoring system. The main functions of HMI are displaying the train’s current operating states and failure information, alarming. It can also implement train control function and store the historical dates of train’s operations, and so on. This article designed a human-machine interface based on Linux-FLTK, using ARM framework as the hardware platform, embedded Linux as the software platform, open-source graphics tool FLULD to develop the program interface. After verification, the program has the advantages of programmed with simple structure, short development cycle, strong portability, small target program. Now it has the wide field of application in rail vehicle industries.