Impact zhishaji call impact crusher. Counterattack type business sand machine work principle: stone by impact type business sand machine upper straight fall into high-speed rotating of turntable, in high-speed centrifugal force of role Xia, and another part to umbrella type way shunt in turntable around of impact block produced high speed of impact and high-density of broken, stone in mutual combat Hou, and will in turntable and machine shell Zhijian formed Eddy movement and caused repeatedly of mutual combat, and friction, and broken, and until broken into by requirements of grain degrees.