Electrical motor drives through V-belts and makes the rotor run at high speed. Materials will be fed into the crushing chamber from feed inlet, and be struck by the plate hammer which rotates at high speed. The materials are thrown up to the dentate reaction plate on the top of the crushing chamber and then falls down, the thrown-up and falling-down materials are crushed by striking with each other. The big incompletely crushed materials will form big stress and bending force at the interaction of hammer and thick impact plate in P crushing chamber, even the hard crushed materials will be broken and enter into the following S and T crushing chamber. The materials in these two crushing chambers can be medium and fine crushed by striking, impacting, bending and extruding, then discharged out of the machine.