Abstract: In view of the coal mine belt conveyor in the production process of using reverse coal flow to start, there is no load or light load in the restart process for a long time, resulting in serious waste of electric energy and other problems, a multi-level series belt conveyor energy-saving control system is designed. The system uses PLC as the control core and combined with coal quantity identification device to realize the one key start and stop control of belt conveyor along coal flow. The coal load is balanced. The corresponding relationship among coal flow, belt speed and energy consumption is obtained through BP neural network modeling and important parameter optimization. Through the field practical application, it is verified that the system can realize the ability of energy saving, consumption reduction and efficient transportation.