The power is decelerated by the speed reducer and the torque is increased and transferred to the movable knife on the main shaft. The rotating movable knife and the fixed knife of the body will shear and crush the natural rubber, synthetic rubber and other types of large rubber lumps into small rubber lumps with certain specifications, providing favorable conditions for the next process. Add a spraying device, in the crushing of rubber blocks at the same time, the rubber has the role of cleaning.