Counterattack crusher is a kind of the use of impact energy to broken material crushing machine, this machine is working, under the drive of the motor, the rotor high-speed rotation, the material into the plate hammer function area, and the rotor plate hammer impact broken, and then again to counter device is broken, and then back to the board from the back plate hammer function area is broken again, this process is repeated, material from big to small into one, two, three, back cavity repeated broken, until the material being broken to the required size, is being exhausted from port discharge, adjust the clearance between the back frame and rotor can achieve the purpose of the material discharging granularity and material to change shape.