Abstract: Using high speed impacting SHPB apparatus, test rock and ore of four crack types. Under the high speed impect, measure and produce the following:the curves of stress wave, the curves of strain vs time, stress vs time, stress vs strain, stress vs strain vs strain rate and stress vs strain vs the crack type. Compute the dynamic fracture strength and elastic modulus. Compare the dynamic fracture strength and elastic modulus. Compare the mechanical properties of the crack rock and ore in static and dynamic state. Obtain numerical relationship of crack and no crack rock and ore in different mechanical state.