To　verify　the　effect　of　the　hybrid　seismic　mitigation　and　isolation　device　(the　combination　of　two　or　more　than　two　kinds　of　the　seismic　mitigation　and　isolation　devices)　applied　to　the　single-pylon　cable-stayed　bridge,　the　main　bridge　of　the　Xuyin　Road　Chaobai　River　Bridge　was　taken　as　an　object　for　study.　Both　the　lead-rubber　bearing　and　the　fluid　viscous　damper　were　applied　to　the　transverse　seismic　design　of　the　transition　pier　of　the　bridge,　the　effect　of　the　hybrid　seismic　mitigation　and　isolation　device　of　the　bearing　and　damper　on　the　seismic　performance　of　the　bridge　was　analyzed　by　the　MIDAS　Civil　2012　and　by　parametric　analysis　of　the　damper,　the　parameters　of　the　device　that　were　suitable　for　the　bridge　were　obtained.　The　results　of　the　analysis　indicate　that　the　device　can　resolve　the　transverse　seismic　problem　of　the　bridge.　In　comparison　to　the　common　design,　the　device　can　avoid　the　shear　failure　of　the　pot　bearing　in　the　transverse　direction　of　the　bridge　and　can　effectively　decrease　the　force　in　the　transition　pier　and　in　comparison　to　the　seismic　design　of　using　the　lead-rubber　bearing　alone,　the　device　can　improve　the　transverse　displacement　response　and　the　force　of　the　pylon,　but　will　increase　the　force　in　the　transition　pier　to　a　slight　extent.　©,　2014,　Wuhan　Bridge　Research　Institute.　All　right　reserved.