In　order　to　meet　the　requirement　of　offshore　bridges　in　highly　seismic　regions　for　isolation　bearings　with　large-tonnage　load　capacity,　displacement　and　durability,　a　novel　multi-spherical　sliding　friction　isolation　bearing　was　developed　and　its　constructional　characteristics,　working　mechanism　and　sliding　mechanism　were　introduced.　A　nonlinear　restoring　model　of　its　force-displacement　relationship　and　the　formulas　of　the　relationship　with　identical　coefficient　of　all　friction　surfaces　were　established.　A　mechanical　performance　experiment　of　the　bearing　was　carried　out　and　its　sliding　sequence　of　all　friction　surfaces　and　its　nonlinear　restoring　model　were　tested.　The　results　indicate　that　sliding　sequence　in　theoretical　analysis　is　identical　to　that　in　experimental　observation　and　the　force-displacement　relationships　in　theoretical　analysis　and　experimental　observation　are　consistent,　thus　indicating　the　bearing　is　of　high　dissipative　energy　capacity　and　enough　displacement　in　earthquakes.　The　smart　stiffness　and　damping　behavior　of　the　bearing　under　various　external　intense　stimulations　is　applicable　to　the　performance-based　seismic　design　of　bridges　at　the　multiple　levels　of　ground　shaking.