Anti-dip　rock　slopes　are　widely　developed　and　distributed　in　the　Three　Rivers　basin　in　China,　and　associated　deformation　and　damage　phenomena　are　especially　prominent　among　slope　problems,　including　composite　toppling　under　internal　and　external　dynamic　coupling.　Through　a　model　test　of　similar　material,　the　entire　sliding-toppling　composite　deformation　and　failure　process　of　an　anti-dip　rock　slope　under　an　external　load　is　studied.　The　macroscopic　deformation,　rock　displacement,　and　maximum　flexural　surface　in　the　process　of　slope　deformation　and　failure　are　analyzed,　and　the　composite　toppling　failure　mechanism　and　evolution　law　of　the　anti-dip　layered　rock　slope　under　various　stress　conditions　are　revealed.　A　physical　model　is　validated　by　inverting　the　Zongrong　landslide　through　discrete　element　numerical　simulations,　and　the　anti-dip　rock　slope　with　composite　toppling　deformation　is　divided.　The　research　results　show　that　(1)　block　toppling-shear　slip　damage　occurs　in　the　toe　area,　which　is　accompanied　by　the　maximum　flexural　surface,　the　lower　rock　layer　shows　multilayer　flexural　toppling,　the　upper　rock　layer　is　relatively　stable,　and　the　slope　is　zoned　according　to　the　D-f　value;　(2)　deep　dissection　of　the　river　is　a　precondition　of　such　slope　toppling　deformation,　while　rainfall　was　a　predisposing　factor　for　the　Zongrong　landslide;　and　(3)　the　failure　mode　of　the　anti-dip　rock　slope　under　an　external　load　is　generalized　into　five　main　stages,　shear　slip　of　the　slope　toe　-＞　block　toppling　of　the　slope　toe　-＞　maximum　flexural　surface　-＞　deep　flexural　toppling　of　the　rock　stratum　under　the　flexural　surface　-＞　penetration　of　the　main　fracture　surface,　and　verified　using　the　discrete　element　numerical　model.