The author applies the impact theory to carry out mechanical analy-sis of impact between crusher hammer and rock to obtain calculating equations of im-pact force, pin and axle impact force and impact energy consumption. 本文应用碰撞理论对锤式破碎机的锤子碰撞岩石进行了碰撞力学分析,获得了冲击力、销轴反冲击力和冲击能耗计算公式。