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Aiming at the shortcomings of manual control of mine ball mills, such as high labor intensity and subjective factors, or poor stability, large fluctuations, and low accuracy in the traditional PID control of slurry concentration, the design and development based on the Expert-PID algorithm are proposed. The Internet of Things control system for mine ball mills. The article first constructed a five-tuple ball mill model BallMill=, designed a four-layer IoT measurement and control system macro structure including the perception layer, the convergence layer, the operation layer, and the application layer, and then introduced The detailed contents of traditional PID algorithm and Expert-PID algorithm are discussed, and the principle structure and expert regulation rules of the mine ball mill Expert-PID algorithm IoT control system are discussed. Enterprise application practice and comparative experiments show that the system adopts Expert-PID algorithm and has better robustness, stability and reliability than traditional PID algorithm.