One　full-scale　lightweight　steel　frame　(LSF)　specimen　and　three　full-scale　prefabricated　lightweight　steel　frame-light　steel　keel-lightweight　concrete　shear　wall　(LFSW)　structure　specimens　were　designed　and　fabricated　to　study　the　effect　of　two　assembly　methods　(embedded　installation　or　external　installation)　and　the　two　light　steel　keel　distribution　modes　(frame　or　truss)　on　the　seismic　behavior　of　the　LFSW　structure.　The　failure　modes　and　damage　evolution　process　were　studied,　and　the　hysteretic　characteristics,　ultimate　strength,　deformation　capacity,　stiffness　degradation,　energy　dissipation　and　strain　characteristics　were　analyzed　by　the　low-period　cyclic　load　experiment.　Results　show　that　the　lightweight　steel　frame　and　light　steel　keel-lightweight　concrete　shear　wall　has　good　mutual　work　performance.　Compared　with　LSF　specimen　the　ultimate　strength　of　LFSW　specimens　are　improved　by　204.　7%　to　210.　4%　and　the　initial　stiffness　improved　by　257.　3%　to　512.　5%,　and　the　deformation　capacity　and　energy　dissipation　are　also　significantly　improved.　The　self-tapping　nail　joints　of　embedded　wall　and　high-strength　bolt　joints　of　external　wall　both　have　reliable　mechanical　performance,　and　the　mechanics　characteristic　of　two　seismic　fortification　lines　was　discovered　on　LFSW　structure.　The　calculation　model　of　ultimate　strength　was　established　based　on　Simplified　Plastic　Model　and　Softened　Strut-and-Tie　Model,　the　proposed　practical　calculating　method　can　evaluate　the　ultimate　strength　favorably.　©　2024　Beijing　University　of　Technology.　All　rights　reserved.