Landslide　in　intensive　seismic　zone　has　its　peculiar　features.　Some　slope　may　be　stable　under　static　load　(normal　state).　When　the　slope　is　in　limit　equilibrium　state,　even　a　slight　earthquake　may　trigger　it　to　destabilize.　An　intensive　earthquake　may　directly　cause　a　whole　slope　to　fail.　Kangding　City　is　located　in　the　intersection　of　three　famous　active　seismic　belts　and　thus　with　frequent　earthquake　activity.　Many　earthquakes　occurred　there　in　the　past　and　the　basic　earthquake　intensity　is　IX　degree.　Frequent　earthquake　activity　directly　influences　the　slope　stability　in　the　region,　earthquake　is　the　key　factor　inducing　landslide　and　rockfall.　In　view　of　this,　dynamic　discrete　element　method　(DDEM)　is　adopted　in　analyzing　the　stability　of　a　slope　in　Kangding　City,　emphasis　is　laid　on　modeling　of　seismic　effects　on　slope　stability.　The　modeling　results　indicate　that　even　an　earthquake　with　intensity　V　degree　is　enough　to　cause　the　front　slope　to　slide,　earthquake　with　intensity　IX　degree　will　makes　the　whole　slope　to　fail　and　slide.　The　harnessing　engineering　is　quite　effective　to　earthquake　with　intensity　less　than　V　degree.　However,　when　earthquake　with　intensity　IX　degree　occurs,　the　bolting　engineering　in　the　steep　part　will　be　destroyed　first　and　then　the　slide-resistant　piles　and　finally　the　whole　slope.　©　2018　ISRM　International　Symposium　2000,　IS　2000.　All　rights　reserved.