Double　steel　plate　concrete　composite　shear　wall　(SCSW)　has　been　widely　utilized　in　nuclear　power　plants　and　high-rise　structures,　and　its　shear　connectors　have　a　substantial　impact　on　the　seismic　performance　of　SCSW.　Therefore,　in　this　study,　the　mechanical　properties　of　SCSW　with　angle　stiffening　ribs　as　shear　connections　were　parametrically　examined　for　the　reactor　containment　structure　of　nuclear　power　plants.　The　axial　compression　ratio　of　the　SCSW,　the　spacing　of　the　angle　stiffening　rib　arrangement　and　the　thickness　of　the　angle　stiffening　rib　steel　plate　were　selected　as　the　study　parameters.　Four　finite　element　models　were　constructed　by　using　the　finite　element　program　named　ABAQUS　to　verify　the　experimental　results　of　our　team,　and　13　finite　element　models　were　established　to　investigate　the　selected　three　parameters.　Thus,　the　shear　capacity,　deformation　capacity,　ductility　and　energy　dissipation　capacity　of　SCSW　were　determined.　The　research　results　show　that:　compared　with　studs,　using　stiffened　ribs　as　shear　connectors　can　significantly　enhance　the　mechanical　properties　of　SCSW;　When　the　axial　compression　ratio　is　0.3–0.4,　the　seismic　performance　of　SCSW　can　be　maximized;　with　the　lowering　of　stiffener　gap,　the　shear　bearing　capacity　is　greatly　enhanced,　and　when　the　gap　is　lowered　to　a　specific　distance,　the　shear　bearing　capacity　has　no　major　affect;　in　addition,　increasing　the　thickness　of　stiffeners　can　significantly　increase　the　shear　capacity,　ductility　and　energy　dissipation　capacity　of　SCSW.　With　the　rise　in　the　thickness　of　angle　stiffening　ribs,　the　improvement　rate　of　each　mechanical　property　index　slows　down.　Finally,　the　shear　bearing　capacity　calculation　formula　of　SCSW　with　angle　stiffening　ribs　as　shear　connectors　is　derived.　The　average　error　between　the　theoretical　calculation　formula　and　the　finite　element　calculation　results　is　8%　demonstrating　that　the　theoretical　formula　is　reliable.　This　study　can　provide　reference　for　the　design　of　SCSW.　©　2023　Korean　Nuclear　Society