Based on the three-degrees-of-freedom dynamics model set up for the far-field spreading of explosion stress wave in high-steep slope,the dynamic response process of explosion stress wave was simulated by Matlab engineering software.The simulation result of the explosion stress excitation of single point exploding spot showed that the medium displacement response at the bottom of slope was the biggest one was second at the middle part of slope,one was the smallest at the top of slope,and relation of them followed power law to attenuate,the displacement response had apparently hysteresis effect at the same time;the frequency response was same as displacement response,the high frequency of constituents quickly attenuated with the increase of steps.With respect to the explosion stress excitation of multipoint exploding spots,the simulation result showed that medium displacement response of slope rock at the top of slope was the biggest,one was second at the middle part of slope,one was the smallest at the bottom of slope,and the explosion stress wave had dynamic amplification effect at the top of slope;On the contrary,the frequency response was the biggest at the bottom of slope,it was second at the middle part of slope and it was the smallest at the top of slope.The simulation results matched with the results on site testing.