Equipment parameters should be suitable for the materials The jaw plate should be fastened regularly The materials with good plasticity such as lead plate, plywood and cement mortar can be placed between the two surfaces The materials of the jaw plate should correspond to rocks hardness For the large-sized jaw crusher, the large rocks and stones make the jaw plate wear seriously. Therefore, the high manganese steel can be used as the material of the jaw plate. Due to the jaw plate is usually formed into a vertically symmetrical shape, it can be inverted to use secondly