In view of the poor control effect of the sorting system of modern coal mine coarse slime classifier,a design scheme of the sorting system of modern coal mine coarse slime classifier was introduced based on particle swarm optimization algorithm.The system is mainly composed of two parts:software and hardware.The hardware part includes PLC(Programmable Logic Controller)and communication module,and the software part includes touch screen HMI(Human Machine Interface),host computer monitoring interface and anti-lag model-free adaptive controller based on PSO(Particle Swarm Optimization).With the cooperation of hardware and software,the sorting system of the sorting machine is controlled,which improves the operation effect of the sorting system,makes the sorting of coarse coal slime more accurate,and also helps to improve the quality of coal after sorting.