In　this　paper,　the　seismic　performance　of　the　prefabricated　segmental　reinforced　concrete(RC)pier　with　hybrid　cast-in-place　UHPC　and　prefabricated　mortise-tenon　connections　was　studied.　An　existing　bridge　was　used　as　a　case.　With　a　scale　ratio　of　1　:　5　and　an　axial　compression　ratio　of　0.　1,　four　pier　specimens　were　prepared,　including　the　specimen　ZT-1　(an　integral　cast-in-place　pier)，specimen　CFST-1　(a　prefabricated　segmental　RC　pier　with　hybrid　concrete-filled　steel　tubular　mortise-tenon　and　grout　sleeve　connections)，specimen　UT-1　(a　prefabricated　segmental　RC　pier　with　hybrid　cast-in-place　UHPC　and　prefabricated　mortise-tenon　connections,　with　the　cast-in-place　UHPC　stitch　located　at　the　pier　base)　and　specimen　UT-2　(a　prefabricated　segmental　RC　pier　with　hybrid　cast-in-place　UHPC　and　prefabricated　mortise-tenon　connections,　with　the　cast-in-place　UHPC　stitch　located　200　mm　above　pier　base).　Quasi-static　tests　were　performed　to　analyze　the　failure　modes　of　different　specimens　and　compare　multiple　parameters,　including　hysteresis　curves,skeleton　curves,　ductility,energy　dissipation　capacity　and　stiffness　degradation.　It　is　shown　that　all　the　four　specimens　exhibit　compression　bending　failure,　the　plastic　hinges　of　the　specimens　ZT-1　and　UT-2　are　found　at　the　pier　base,　while　the　plastic　hinges　of　the　specimens　CFST-land　UT-1　are　higher　above　the　pier　base.　Compared　with　specimen　ZT-1,the　peak　loads　of　specimens　UT-1　and　UT-2　have　got　an　increase　of　3.　52%　and　7.09%,respectively　and　the　displacement　ductility　coefficients　embody　an　increase　of　2.　22　%　and　4.　60%,respectively.　Compared　with　specimen　CFST-1，the　peak　loads　of　specimens　UT-land　UT-2　are　lower,　but　the　displacement　ductility　coefficients　of　the　specimens　UT-1　and　UT-2　are　enlarged　by　18.　38　%　and　21.　14%，respectively.　The　energy　dissipation　capacity　of　specimen　UT-2　is　superior　to　that　of　specimen　UT-1.　The　load　bearing　capacities　of　specimens　UT-land　UT-2　decrease　slowly,　but　deform　easily,　indicating　that　the　prefabricated　segmental　RC　pier　with　hybrid　cast-in-place　UHPC　and　prefabricated　mortise-tenon　connections　has　better　seismic　performance.　©　2023　Wuhan　Bridge　Research　Institute.　All　rights　reserved.