Abstract;　Zhangmu,　located　in　middle　Himalayas,　is　an　important　trading　port　between　China　and　Nepal　and　serves　as　the　regional　economic　development　center.　Special　geological　and　topo-graphical　characteristics　and　abundant　precipitation　provide　sufficient　conditions　for　the　frequentoccurrence　of　geological　disasters?　especially　the　landslide　disasters　in　the　region.　As　a　large　num¬ber　of　house　buildings　were　built　on　the　deposit　of　Zhangmu　landslide?　the　landslide　disasters　se¬riously　threaten　the　safety　and　property　of　the　local　people?　and　restrict　the　development　of　port　economy.　Previous　studies　on　the　stability　of　Zhangmu　landslide　deposit　only　focus　on　the　rain¬storm　condition　and　the　seismic　action　simplified　by　strength　reduction　method　while　ignoring　the　dynamic　action　process　of　the　earthquake　and　the　influence　of　human　activities.　In　order　to　accu¬rately　demonstrate　the　stability　of　the　landslide　deposit　under　dynamic　load,　this　paper　calculated　the　dynamic　safety　coefficients　under　extreme　conditions　such　as　earthquake　and　vehicle　vibration　according　to　field　investigations?　and　evaluated　the　ultimate　bearing　capacity　by　block　based　on　the　characteristics　of　geology?　topography　and　existing　landslides　distribution.　The　results　show　that　the　deposit　of　ancient　landslide　is　generally　stable?　but　the　bearing　capacity　of　the　front　and　back　edge　sections　is　relatively　low.　The　modern　landslide　has　poor　stability　and　no　further　load-　bearing　space.　Therefore?　it　is　prohibited　for　the　modern　landslide　to　increase　the　apparent　load.　The　conclusions　of　this　paper　provide　scientific　support　for　the　systematic　control　of　Zhangmu　landslide?　the　layout　of　Zhangmu　construction　land　and　the　sustainable　development　of　the　trading.　©　2022　Xi＇an　Institute　of　Geology　and　Mineral　Resources.　All　rights　reserved.