A　new　multiple　lateral　force　resisting　system　consisting　of　coupled　low-yield-point　steel　plate　shear　walls　(C-LSPSW)　was　proposed　as　a　promising　alternative　to　improve　the　ductility,　energy-dissipation　capacity,　architectural　flexibility,　and　economic　efficiency　of　steel　plate　shear　walls　(SPSWs).　To　investigate　its　seismic　performance　and　damage　behavior,　eight　C-LSPSW　specimens　with　different　configuration　parameters,　including　two　different　stories　and　four　different　section　sizes　of　coupling　beams　(CBs),　were　designed　and　the　corresponding　numerical　models　were　established　by　verified　modeling　approach.　The　incremental　dynamic　analyses　(IDA)　were　conducted　on　these　specimens,　and　the　multi-stage　damage　indices　of　the　C-LSPSW　system　were　proposed　based　on　different　damage　states.　The　design　suggestions　for　the　C-LSPSW　system　were　proposed　in　terms　of　the　fragility　analyses.　The　analytical　results　demonstrated　that　the　ductile　damage　mechanism　with　the　sequence　of　＂infill　plates　to　CBs　or　horizontal　boundary　elements　(HBEs)　to　vertical　boundary　elements　(VBEs)＂　was　achieved　more　easily　in　the　C-LSPSW　system,　which　gave　full　play　to　the　superiority　of　multiple　seismic　defense　lines.　Under　high　seismic　excitation,　the　failure　probability　of　the　C-LSPSW　system　was　smaller　than　that　of　the　LSPSW　system,　and　the　coupling　superiority　was　more　obvious　in　higher　structures.　The　optimum　performance　of　C-LSPSW　system　was　observed　when　the　plastic　moment　capacity　ratio　of　CBs　to　HBEs　(M-pCB/M-pHBE)　was　2.0.　As　a　result,　an　optimal　solution　with　M-pCB/M-pHBE　=　2.0　was　suggested　as　a　good　compromise　between　the　architectural　requirements,　material　efficiency,　and　seismic　performance.