Abstract: Lighting system is an essential auxiliary system to ensure normal production of coal preparation plant; however,the traditional lighting system was designed as local control,which is low efficiency,a waste of resource as well as is not safe. With the fast development of computer,network etc.,centralized automatic control is becoming popular in lighting system of coal preparation plant. To improve control of lighting system in Shunhe coal preparation plant,the centralized control system with PLC as core unit is built.