machine used the relative motion between movable and fixed teeth disc, the raw material to be crushed undertakes the comprehensive action such as impacted by teeth, friction ,impacted between raw material, finally the raw materials are crushed. Its features are simple and solid in structure, stable in operation, high in crushed 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 changing screen with different mesh.