Abstract: The current status of the operation of a belt conveyor is analyzed, due to the fact that the upstream and downstream belts need to adjust the belt speed dynamically with the load, a fuzzy controller is designed to adjust the belt speed according to the load of each belt.The differences between the speed of the belt conveyor and the downstream belt and the load change rate of the belt are processed by the fuzzy controller, and then the controller transfers the corresponding analog signal to the frequency converter.Thereby, the running speed of the belt conveyor is adjusted, and the synchronous tracking adjustment of the speed is realized.Based on S7 1200 PLC, a specific hardware system for belt conveyor control is designed.This thesis uses Siemens TIA portal programming software and MATLAB simulation software to complete the program design of frequency conversion tracking speed regulation.The fuzzy controller has been simulated and verified, and the automatic control functions of the flow start, the flow stop, running with load, stopping without load, turning quickly with more load, turning slowly with less load, and synchronous tracking and adjustment of speed have been realized.