The structure of the jaw crusher is diverse, but the working principle is the same, that is, the periodic movement of the movable jaw plate is used to destroy the material. When the movable jaw plate swings around the suspension axis and the fixed jaw plate, the material between the two jaw plates will be crushed and split. In the initial stage, the pressure is small, so that the volume of the material becomes smaller, and the materials squeeze each other; when the pressure exceeds the maximum bearing limit of the material, it will rupture. On the contrary, when the movable jaw leaves the fixed jaw and swings in the opposite direction, the material moves downwards by gravity. Because each cycle of the movable jaw plate will squeeze the material and discharge it downward. After several cycles, the broken materials are discharged out of the machine through the discharge port.