1. It is simple structure, safe, dependable, easy to mount and easy to operate, low vibration, high output; 2. It is widely used for grinding granular materials, such as corn, sorghum, wheat, soybean, etc; 3. Steel plate welded structure; motor and rotor are mounted on same base plate; 4. Pin coupling direct connection driving; all of all rotors pass an accurate dynamic balancing test; 5. Ensure the safe operation door is locked when the machine is in operation 6. The inlet is on top of machine for ease of operation.