In order to ensure that the process of Youzhong Coal Preparation Plant is reasonable, the purpose of putting into production and putting into production is realized, and the situation that the coal preparation plant is built on the day of transformation is avoided. Through the analysis of the raw coal quality data of Youzhong Coal Industry, the reasonable product structure is determined, and then the coal preparation process design is carried out. Through the analysis of each link, the combined process of pressurized three-product heavy medium cyclone + coarse slime interference bed separation + flotation + tailings concentration and pressure filtration process is determined. The system is normally opened when the injection coal is produced. The power coal is produced, the powder is removed in advance by 6 mm, and the coarse slime direct recovery + flotation system is closed. The system can flexibly produce the injection clean coal and the power coal, and ensure the efficient production of the coal preparation plant.