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.