Beidou satellite navigation system is a global satellite navigation system independently developed by China, which can provide high-precision positioning, navigation and timing services. The Beidou positioning antenna of the freight car is installed on the top of the freight car or outside the carriage. It can determine the position, speed and driving direction of the truck by receiving Beidou satellite signals, and transmit these information to the vehicle terminal or monitoring platform to realize real-time monitoring and management of the truck.