In　order　to　utilize　the　potential　aseismic　capability　of　the　sliding　piers　and　reduce　the　seismic　responses　of　the　fixed　pier,　the　safe-belt　device　was　put　forward,　which　might　allow　sliding　piers　to　share　the　seismic　load　of　the　superstructure　with　the　fixed　pier.　A　vibration　table　experiment　and　simulation　of　the　finite　element　model　(FEM)　of　a　three-span　continuous　bridge　with　equal　height　piers　were　conducted.　Then,　the　aseismic　effect　and　aseismic　mechanism　of　safe-belt　device　were　studied　by　taking　a　five-span　continuous　bridge　with　equal　height　piers　as　an　example.　Finally,　parameters　of　safe-belt　device　were　optimized.　The　results　show　that　the　safe-belt　device　can　effectively　reduce　the　seismic　responses　of　the　fixed　pier　in　a　continuous　bridge　with　equal　height　piers,　but　it　can　greatly　increase　the　seismic　responses　of　the　sliding　pier　at　the　same　time.　The　acceleration　threshold,　the　tensile　stiffness　of　the　brace　and　the　ultimate　tension　of　the　brace　had　great　impacts　on　the　aseismic　effect　of　the　safe-belt　device,　so　they　should　be　optimized　according　to　the　structural　characteristics　of　the　bridge　and　site　conditions　to　obtain　a　better　aseismic　effect.　The　initial　gap　and　the　locking　gap　had　little　impacts　on　the　aseismic　effect　of　the　safe-belt　device.