This machine has wide application and is wide 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, the raw materials to be crushed undertakes the comprehensive actions such as impacted by teeth, friction, impacted between raw materials, finally the raw materials to be crushed. Its features are simple and solid in structure, stable in operation, high crushing efficiency. The crushed raw material can be discharged through the grinding chamber. Moreover, different size of raw material to be crushed can be got through exchanging screen with different mesh; its inner wall is processed finely. So, it is smooth and level. It overcome the shortcomings existed in the old model such as roughness, accumulated powder. It makes the products of medicines; foodstuff and chemicals and so on are in conformity with the requirements of state standard and meet the requirements of GMP.