Working principle: firstly the machine’s leather belt and wheel are driven by the electric motor, then the movable jaw begins to move up and down by the eccentric shaft, when the movable jaw move from top to bottom, the angle between fixed jaw and movable jaw becomes smaller, the materials are crushed into pieces to reach the crushing target. When the movable jaw moves from bottom to top, the angle between fixed jaw and movable jaw becomes bigger, the movable jaw plate deviates from the fixed jaw plate under the function of drag rod and spring, at this moment, the crushed materials are discharged from the bottom outlet of the crushing cavity.