In order to solve the problem of intercommunication and interconnection between FIP network control system of heavy loadlocomotive or subway train and on-board electrical equipments with CAN interface (such as brake control unit, traction control unit, etc.), AWorldFip-CAN gateway was designed, which was used for implementing the data conversion between WorldFip and CAN bus communication.This paper firstly introduced gateway’s architecture and reliability design, and then described the design method of gateway’s hardware andsoftware in detailed. Finally, a test was carried out to examine this gateway’s performance of intercommunication and interconnection viaWorldFip network test platform. The test result shows that the gateway is able to realize communication data transmission in real time andreliably between CAN and WorldFip network. The research and development of this device provide a strong support for promoting thelocalization process of on-board electrical components based on WorldFip network in the field of China railway train.