Large-scale　photovoltaic　power　plants　located　in　highland　mountainous　areas　are　vulnerable　to　landslides　due　to　extreme　rainfall,　posing　a　significant　threat　to　the　normal　operation　of　photovoltaic　power　plants.　However,　limited　research　has　been　conducted　on　landslide　risk　assessment　specifically　tailored　to　large　photovoltaic　power　plants,　with　most　studies　focusing　on　static　assessments　that　lack　long-term　sustainability　in　risk　assessment　and　prediction.　In　this　paper,　a　dynamic　study　on　landslide　risk　at　a　large　photovoltaic　power　plant　project　under　extreme　rainfall　conditions　is　conducted.　Firstly,　the　factors　in　landslide　susceptibility　assessment　based　on　typical　landslide　characteristics　in　the　study　area　are　selected　and　an　assessment　index　database　using　mapping　units　to　extract　the　relevant　factors　is　established.　Subsequently,　the　ANP-FBN　model　is　employed　to　evaluate　the　landslide　susceptibility　of　large　photovoltaic　power　plant　sites.　Furthermore,　an　assessment　index　system　for　landslide　hazard　vulnerability　is　developed　by　considering　population,　economic,　and　material　vulnerabilities,　and　the　AHP　method　is　adapted　to　assess　landslides　vulnerability　in　the　study　area.　Finally,　the　landslide　rainfall　threshold　with　the　susceptibility　and　vulnerability　assessment　results　are　coupled　to　achieve　a　dynamic　assessment　of　landslide　hazard　risk　at　large　photovoltaic　power　plant　sites　under　extreme　rainfall　conditions.　The　findings　highlight　that　the　central　valley　and　the　eastern　steep　slope　of　the　study　area　are　the　primary　＂high＂　and　＂very　high＂　risk　areas.　Moreover,　with　the　increase　in　rainfall　duration,　the　risk　level　of　landslide　hazards　in　the　study　area　also　rises.