Materials can directly enter the rotor and be thrown out after centrifugal acceleration, colliding and crushing with the surrounding protective plate. They can also be diverted through the scattering tray, with some scattering from the surrounding areas and others rushing out after entering the rotor and accelerating, colliding and rubbing with the surrounding scattered materials, and colliding and rebounding with the surrounding protective plate, forming a cyclic impact. As the crushing process progresses, small particles gradually form a layer curtain near the surrounding protective plate, improving the crushing effect and protecting the equipment. Finished products that meet the specifications are discharged from the lower outlet.