A feed grinder mainly uses high-speed rotating crushing parts, such as hammers and blades, to impact, shear and rub the feed raw materials entering the machine, thereby crushing them into smaller particles. For example, the hammer rotates rapidly driven by the motor. When the feed raw materials come into contact with the hammer, they are crushed by a strong impact force. Common feed grinders include hammer type, claw type and other different types. The working principles are slightly different, but generally they all use mechanical force to achieve the purpose of crushing.