In　general,　only　one　fixed　pier　is　set　in　a　continuous　bridge.　It　is　difficult　to　satisfy　seismic　demand　of　the　fixed　pier　in　a　highly　seismic　area.　To　solve　this　problem,　a　pier-bottom　seismic　isolation　structure　with　self-centering　(PSIS-S)　was　placed　at　the　bottom　of　the　fixed　pier,　whose　contact　surface　was　elliptical.　Under　a　strong　earthquake,　there　was　a　relative　swing　between　the　bottom　of　the　fixed　pier　and　bearing　platform,　preventing　the　seismic　energy　from　transferring　to　the　fixed　pier　and　superstructure.　After　the　peak　value　of　the　ground　motion,　the　continuous　bridge　can　basically　return　to　the　initial　equilibrium　position　under　the　action　of　the　self-weight　and　seismic　residual　energy.　A　shake　table　test　and　simulations　of　a　three-span　continuous　bridge　were　conducted.　Then,　taking　a　five-span　continuous　bridge　as　an　example,　the　influence　of　main　parameters　of　the　PSIS-S　structure　on　its　seismic　isolation　effect,　was　studied.　The　results　showed　that　the　PSIS-S　structure　can　effectively　reduce　the　seismic　response　of　the　fixed　pier,　and　that　the　residual　deformation　of　the　bridge　was　small,　meaning　that　the　PSIS-S　structure　had　a　self-centering　capability.　The　ratio　of　the　long　radius　to　the　short　radius　of　the　ellipse　had　a　great　influence　on　the　seismic　isolation　effect　of　the　PSIS-S　structure,　but　the　effect　of　friction　coefficient　could　be　ignored.　©　ASCE.