Abstract: This paper puts forward a monitoring control system for the railway transmission safety doors based on a distributed and modularized monitoring control and configuration scheme.It introduces monitoring control configuration and simulation technology for the real-time monitoring control, parameters' batch configuration and remote command control of front door's control equipment on the platform.Epigyny computer and hypogyny computer use MODBUS TCP/IP protocol, an industrial protocol, to communicate.Proved by the practical application, the system can realize the simulation and monitoring control, fault diagnosis and maintenance management of the subway safety doors' running status effectively.