When　landing　on　the　lunar　surface,　the　astronauts　need　to　wear　the　spacesuit　and　fly　the　lunar　module　in　a　standing　posture.At　this　time,　the　astronauts　bear　the　impact　from　the　vertical　and　horizontal　directions　at　the　same　time.In　order　to　ensure　the　safety　of　the　astronauts　in　bearing　the　impact　load　and　experiencing　the　second　collision,　it　is　necessary　to　determine　the　impact　load　threshold　and　vulnerable　parts　of　impact　collision　that　the　human　body　can　bear.In　this　paper,　the　explicit　finite　element　analysis　software　LSDYNA　is　used　to　simulate　and　analyze　the　modified　Hybird　III　dummy　model,　and　the　responses　of　various　parts　of　the　human　body　are　obtained.After　analysis,　the　following　conclusions　are　drawn:　1　Under　the　combined　impact　load,　the　longitudinal　load　has　a　great　impact　on　the　injury　of　human　lower　limbs,　and　the　transverse　load　has　a　little　impact.　2　Under　the　boundary　conditions　in　this　paper,　it　is　recommended　that　the　peak　value　of　longitudinal　load　borne　by　the　human　body　should　not　exceed　7g　and　the　peak　value　of　transverse　load　should　not　exceed　3G.　3　Under　the　action　of　transverse　loads　in　different　directions,　the　human　head,　chest　and　waist　are　prone　to　secondary　collision　with　spacesuit,　and　the　neck　is　the　most　vulnerable　to　damage,　so　it　is　necessary　to　fully　protect　the　neck.　　©　2022　The　Authors.　Published　by　Elsevier　B.V.