As　one　of　the　regions　with　frequent　engineering　construction　and　frequent　geological　disasters,　the　alpine　gorge　area　of　the　Qinghai-Xizang　Plateau　is　of　great　significance　for　its　environmental　risk　assessment.　This　paper　takes　Chaya　County　in　the　region　as　the　research　object,　combined　with　the　essential　data　survey,　using　remote　sensing　images　and　a　geographic　information　system　(GIS)　platform　to　carry　out　spatial　statistics　and　analyze　common　geological　disasters　in　the　study　area.　Based　on　this,　the　SMOTE-Tomek-random　forest　(STRF)　geological　disaster　evaluation　model　and　the　information　method　model　were　used　to　explore　the　impact　of　engineering　construction　on　the　susceptibility　and　vulnerability　of　geological　disasters　in　the　Alpine　Canyon　area.　The　results　show　that　small　geological　disasters　are　mainly　distributed　in　the　study　area,　accounting　for　67.95%;　the　vulnerability　zoning　of　geological　disasters　in　the　study　area　is　mainly　low　vulnerability　area　and　low　vulnerability　area.　Among　them,　the　high　vulnerability　area　accounts　for　3.2%,　and　the　high　vulnerability　area　accounts　for　9.86%.　From　the　perspective　of　administrative　regions,　the　vulnerability　values　of　Yanduo　Town,　Xiangdui　Town,　and　Jitang　Town　are　higher,　which　is　consistent　with　the　distribution　law　regarding　hidden　danger　points　of　geological　disasters.　Based　on　the　STRF　susceptibility　model　and　the　traditional　random　forest　susceptibility　model,　the　AUC　values　are　all　above　0.9.　In　the　test　set　and　training　set,　the　accuracy　of　the　STRF　model　is　slightly　reduced.　However,　the　interpretability　of　the　address　disaster　model　in　the　Alpine　Gorge　area　is　enhanced.　The　region’s　susceptibility　area　is　the　highest,　accounting　for　50.59,　46.96,　and　38.74%,　respectively.　The　project’s　construction　has　increased　the　geological　disaster-prone　areas　in　the　study　area　by　183.21　and　38.9 km2,　respectively.　The　results　show　that　the　STRF　model　is　feasible　in　assessing　geological　disaster　susceptibility　in　the　Alpine　Canyon　area.　©　The　Author(s)　2025.