General natural stones are big; it is not suitable for construction. So we must crush these stones into small size or change the form of it. Stone crushing machine is the the machine that may be used to reduce the size, or change the form of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated. Usually we crush stones into 10mm, 12mm, 19mm, 25mm, 50mm, 100mm.