After the material entering the crusher through hopper, it meets high-speed rotary hammer and  was hit onto the adjustable wear-resisting tooth board of the crusher inlet , first broken, the particles after broken basically the same uniform materials into the main crushing cavity and second main broken, in the crushing cavity have been homogenization materials particles from hammer head again gains kinetic energy, high-speed rushed to counterattack cavity internal gear-shape liner after tooth liner run up, again by hammer head broken, meanwhile material also influenced by each other's hitting and broken, so repeatedly circulation, in the impact cavity broken many times, finally the broken materials eduction from discharging port , the material which is finely finished product. Product granularity control through the rotor and counterattack plate gap adjustment to realize.