This machine adopts multi-stage continuous crushing chamber, with large crushing ratio, and the discharging particle size can be adjusted arbitrarily; The incorruptible materials can be discharged automatically without causing equipment damage; The rotor body of this machine has a unique structure. When crushing materials, the rotor body hardly wears; The crusher is designed according to the principle of progressive increase of input energy and graded crushing of materials. The materials enter the working chamber from the feed hopper in turn and fall on the high-speed rotating crushing arm. While crushing, tearing and mixing the materials, they collide and crush with the materials at high speed, resulting in large pieces of materials falling into the lower grinding chamber. The large pieces of materials will collide and rub with each other between the grinding wheel and the casing for many times to crush. After many crushing cycles, the materials achieve the effect of ultra-fine crushing. The finer granular materials enter the bottom of the crusher through the particle size adjustment ring, and are finally discharged from the cavity through the continuous rotation of the discharge fan.