The　excellent　bonding　property　between　UHPC(ultra-high　performance　concrete)and　stone　is　the　key　to　ensuring　the　reinforcement　effect　of　existing　stone　structure　buildings　by　UHPC.　Therefore,　in　order　to　explore　the　interface　shearing　behavior　between　UHPC　and　stone,　five　groups　of　specimens　with　smooth　surface,　chisel　treatment　and　different　groove　depths　were　investigated　by　push-off　tests.　Then,　the　failure　model,　load-slip　curve,　interfacial　shear　strength,　and　matrix　strain　of　UHPC-stone　specimens　were　studied.　Based　on　the　experimental　results,　the　numerical　simulation　was　carried　out　and　the　formula　of　shearing　capacity　was　proposed.　The　results　show　that　the　interface　grooves　treatment　could　significantly　improve　the　interface　shear　strength,　change　the　failure　model　and　effectively　improve　the　ductility　of　specimens.　The　specimen　shows　better　interface　bonding　strength　and　ductility　when　the　groove　depth　is　20　mm.　In　addition,　the　strain　development　of　UHPC　matrix　is　similar　to　that　of　stone　at　the　elastic　deformation　stage,　which　indicates　that　the　both　materials　have　better　coordinated　deformation　ability　at　this　stage.　Through　the　verification　of　numerical　simulation　and　calculation　formula　of　interface　bearing　capacity,　the　load-slip　curve,　interfacial　bonding　strength　and　stress　distribution　from　numerical　simulation　are　in　good　agreement　with　these　from　experiment.　In　addition,　the　results　of　parameter　analysis　of　different　groove　shapes　show　that　the　positive　trapezoid　treatment　can　improves　the　interface　shear　performance　at　groove　depth　of　10　mm　and　20　mm.　Compared　with　the　existing　formulas　of　shearing　bearing　capacity,　the　proposed　formula　can　effectively　predict　the　interface　shear　capacity　of　UHPC-stone.　©　2025　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.