The　prefabricated　bridge　adopts　the　construction　method　of　factory　prefabrication　and　on-site　assembly,　which　has　the　advantages　of　high　construction　quality,　short　construction　period　and　less　environmental　disturbance.　To　meet　the　construction　requirements　of　the　prefabricated　bridge　substructure,　this　paper　proposes　a　new　type　of　embedded　concrete-filled　steel　tube　(CFST)　pier　column-cap　beam　socket　connection　joint　combined　with　Ultra　High-Performance　Concrete　(UHPC).　A　quasi-static　test　with　a　scale　of　1:3　was　carried　out　to　reveal　the　damage　development　and　failure　modes　of　the　joints,　to　study　the　influence　of　the　socket　depth　on　the　seismic　performance　of　the　joints,　and　to　establish　a　refined　numerical　analysis　model　of　the　joints　based　on　ABAQUS.　The　research　results　show　that　the　socket　depth　of　1.2　times　the　CFST　diameter　can　ensure　that　the　damage　occurs　outside　the　joint　area,　and　the　cap　beam　maintains　an　elastic　state.　The　good　seismic　performance　of　the　new　joint　is　verified　by　analyzing　the　seismic　performance　indicators　such　as　hysteretic　curve,　socket　capacity　and　energy　dissipation　capacity.　Based　on　the　test　results,　it　is　verified　that　the　joint　numerical　analysis　model　can　predict　the　overall　seismic　response　and　capacity　of　the　joints　with　reasonable　accuracy.　The　research　work　in　this　paper　can　provide　a　reference　for　the　engineering　application　of　prefabricated　bridge　substructure　in　medium　and　high　seismic　intensity　areas.　©　2024　Science　Press.　All　rights　reserved.