The　grottoes　in　the　Sichuan　and　Chongqing　area　are　mainly　carved　into　cliff　walls　where　alternating　layers　of　sandstone　and　mudstone　are　exposed.　The　natural　rock　eaves　in　the　upper　part　of　the　cliffs　provide　protection　for　the　sculptures　in　the　lower　part.　To　assess　the　stability　of　these　eaves　under　natural　conditions,　this　study　investigates　the　stratigraphic　characteristics,　rock　mass　structure,　dimensions　and　mechanical　parameters　of　the　eaves.　With　using　FLAC3D　for　calculation　and　analysis,　three　main　failure　modes　are　identified:　cantilever　tensile　failure,　toppling　failure　and　soft　foundation　crushing　failure.　The　study　also　identifies　the　damage　characteristics,　key　factors　affecting　eaves　stability　and　their　effects.　A　stability　evaluation　reference　table　is　provided　for　field　investigations　and　stability　evaluation　of　grottoes　eaves　in　the　Sichuan　and　Chongqing　area.　©　2024　Chongqing　University.　All　rights　reserved.