This machine is widely used for pharmaceutical industry, chemical industry, pesticide industry, foodstuff industry, grain industry and so on.This machine uses the relative motion between movable and fixed teeth disc, and the raw materials to be crushed undertakes the comprehensive actions such as impacted by teeth, friction, impacted between raw materials. Finally the raw materials are to be crushed. It features in simple and solid structure, stable in operation and high crushed efficiency. The crushed raw material can be discharged through the grinding chamber. Moreover, different sizes of raw material to be crushed can be got through exchanging screen with different meshes, with its inner wall processed finely.