Abstract: This paper designed a modern tram positioning terminal based on the integrated navigation technology of Beidou satellite and inertial sensor. The terminal received positioning data of Beidou satellite and inertial sensor integrated navigation module from serial port, analyzes and extracted effective information through the main control calculation unit, completed data processing, and uploaded the processed data to the central vehicle location server through a dedicated wireless cluster to implement real-time positioning of all-route vehicles. The terminal has been applied on the Western Suburban Line of Beijing Modern Tram, provided reliable vehicle location information for traffic dispatch.