Hammer mill, hammer mill is a commonly used crushing machine, which mainly produces high-speed impact force by rotating the hammer head to crush materials into extremely fine particles. A machine that crushes materials (including hammering, collision, friction, etc.) by the relative movement of the high-speed rotating movable hammer and the fixed ring. Hammer mills are further divided into paddle mills in which the movable hammering parts are flakes and block mills in which the movable hammering parts are blocks. Grinders are mechanical equipment used to crush various materials, usually for crushing medium or low hardness materials, such as corn, coffee beans, dried mushrooms, medicinal materials, wheat, grains, fish meal, meat and bone meal, etc. The equipment is mainly composed of feed inlet, crushing chamber, discharge outlet, motor and control system. During the crushing process, the material is sent into the crushing chamber, and crushed by a crusher composed of a rotating hammer head and a positioned screen. The quantity, material and rotation speed of the hammer heads can be adjusted according to the nature of the material and the desired crushing effect. As it rotates, the hammer hits the material, breaking it into smaller pieces, which are then discharged through a screen. The hammer mill has the characteristics of simple structure, convenient operation, high production efficiency and good crushing effect. It is suitable for various crushing requirements, different thickness, output, material type and shape. In addition, the hammer mill can also be used in conjunction with other machines. For example, dryers, coolers, conveyors, etc., form a production line to improve production efficiency and product quality. In short, the hammer mill is a kind of mechanical equipment widely used in the field of crushing, which can effectively crush the prepared materials and has broad application prospects.