Local　buckling　has　a　significant　effect　on　the　mechanical　performance　of　double　steel　plate-concrete　(DSC)　composite　walls,　which　are　composed　of　two　faceplates,　an　infilled　concrete　core,　and　connectors　between　them.　In　this　paper,　a　new　type　of　DSC　composite　wall　(SDSC)　was　proposed　by　incorporating　stiffeners　and　tie　plates　welded　on　the　internal　surface　to　enhance　the　local　stability　of　the　faceplate.　Eight　SDSC　specimens　were　designed　to　investigate　the　axial　compression　behavior　of　this　new　composite　walls.　During　the　tests,　the　buckling　stress　and　the　ultimate　strength　of　these　SDSC　walls　were　measured,　and　the　effects　of　the　B/t　ratio　(i.e.,　the　ratio　of　stud　vertical　spacing　to　faceplate　thickness)　and　the　stiffener　spacing　were　analyzed　as　well.　The　results　demonstrated　that　as　the　stiffeners　and　tie　plates　completely　changed　the　faceplates＇s　buckling　mode,　the　buckling　stress　of　the　faceplates　and　the　ultimate　strength　of　SDSC　walls　were　obviously　increased.　It　was　also　concluded　that,　for　the　SDSC　specimens　with　the　same　B/t　ratio,　decreasing　the　stiffener　spacing　would　signif-icantly　improve　the　local　stability　of　the　steel　plates.　Based　on　the　test　results,　numerical　models　were　established　to　further　investigate　the　compressive　behavior　of　SDSC　walls.　The　influences　of　the　key　parameters　included　the　faceplate　thickness,　and　the　stiffness　of　the　stud　and　tie　plate　were　discussed　in　detail.　Theoretical　models　were　finally　recommended　to　estimate　the　buckling　stress,　the　axial　compression　stiffness,　and　the　ultimate　bearing　capacity　of　SDSC　walls,　which　were　effective　and　accurate　in　evaluate　determining　the　axial　compression　per-formance　of　these　new　composite　walls.