This machine utilizes the high--speed relative motion between the moving tooth set and regular tooth set, which makes the material crushed through concussion, rub and crush between the materials. The structure of machine is simple, firm and operating steadily and the result of crushing is well, no dust nuisance. The material is discharged directly from mainframe; the size of the granularity is gained through changing different pore sieve. In addition, this machine is made of the stainless steel, surface of the inside of the machine is smooth, which changes the phenomenon of inboard wall coarse and accumulating of powder in the past. The pharmaceutical, food, chemical production is more in line with national standards. It meets the requirement of GMP.