Mineral Processing Technology is a textbook for the major of coal preparation and coal deep processing and utilization in coal vocational colleges. This paper mainly expounds the coal preparation methods adopted in the coal preparation process, such as gravity separation and flotation, and adds the content of slime water treatment. In order to cultivate students' practical skills, experiments related to the course are added at the end of the book. "Mineral Processing Technology" can also be used as a teaching material for secondary vocational schools, as well as a training material for on-site technicians and operators of coal preparation enterprises, and also has certain reference value for engineers and managers of coal preparation plants.