The video monitoring system for urban rail transit trains mainly consists of two parts: interior monitoring and transmission, and control center monitoring. The first part is to achieve real-time video centralized monitoring of each carriage in the driver's cab, in order to facilitate the driver's quick response to unexpected situations in the carriage; The second part is composed of the urban rail transit control center and adjacent stations, and real-time monitoring of the running train carriages is achieved through wireless video transmission technology