Abstract: Site investigation shows that the rock mass has experienced a complex magmatic activity and multi-phase tectonic processes.There are mainly three types of deformation and failure modes on the left bank,including normal unloading,intercalated gouge in steep crack,and epigenetic reformation in low-angle dislocation interfaces.The paper reveals the occurrence regularity and development of displacement of such slope through dynamic discrete element numerical simulation in the earthquake,based on the detailed studies of the structure type of slope rock,composition of rock structures,rock weathering and physical and mechanical properties.Finally,the dynamic stability and the possible engineering effects of high slopes are comprehensively evaluated.