With the improvement of coal mining mechanization, new technical measures need to be taken in the process flow and coal selection equipment. The coal processing plant that separates coal, removes mineral impurities from the raw coal, and divides it into different specifications of products is called a coal preparation plant (or coal washing plant). With the advancement of technology and the accumulation of production experience, the structure and performance of piston type jigs have undergone new developments. The air chamber jigging machine under the screen adopts our company's cylinders, solenoid valves, and air source processing components, which are reliable in operation, reduce failure rate by 70%, have low energy consumption, and can meet the sorting needs of different media, improving processing capacity by more than 20%; The structure is more reasonable, convenient for transportation and installation, and the equipment load is reduced by 30%; Reduce power by more than 70%.