Replaceable　coupling　beams　(RCBs)　have　gained　great　attentions　in　enhancing　seismic　performances　of　coupled　shear　wall　(CSW)　structures,　showing　superior　advantages　over　the　conventional　reinforced　concrete　(RC)　coupling　beams.　Recently,　the　authors　proposed　using　the　lead　viscoelastic　damper　as　a　replaceable　fuse　to　fabricate　a　new　RCB,　i.e.,　the　lead　viscoelastic　coupling　beam　(LVCB).　The　hysteretic　behaviors　of　this　fuse　were　experimentally　and　numerically　investigated,　but　the　performance　of　using　LVCB　in　controlling　the　seismic　response　of　CSW　structure　has　not　been　studied　yet.　This　paper　therefore　studies　the　seismic　enhancement　of　CSW　structure　with　LVCB.　Finite　element　models　of　CSWs　with　LVCB　or　RC　coupling　beam　are　developed　and　their　hysteretic　behaviors,　energy　dissipating　capacities　and　damage　modes　are　investigated　by　considering　different　floor　configurations.　Nonlinear　time　history　analyses　are　also　performed　to　evaluate　the　seismic　responses　of　the　LVCB　enhanced　CSW　structure.　Results　show　that　applying　the　LVCB　to　the　CSW　makes　the　deformations　concentrate　in　the　damper,　providing　a　favorable　hysteretic　performance　with　an　equivalent　damping　ratio　of　about　0.35.　The　isolated　floor　reduces　about　20　%　of　the　initial　stiffness　of　the　CSW　structure,　but　has　insignificant　effect　on　the　loading　capacity,　which　can　improve　the　damper＇s　deformability　and　reduce　damages　of　RC　components.　The　seismic　response　analyses　also　demonstrate　the　effectiveness　of　the　LVCB　for　structural　response　mitigation,　giving　the　average　reduction　ratios　on　story　drift,　shear　force　and　bending　moment　are　8.28　%,　11.49　%　and　8.22　%,　respectively.　It　is　believed　that　the　LVCB　is　a　reliable　and　practical　RCB,　showing　a　wide　application　prospect　in　engineering　practices.