In　order　to　investigate　the　seismic　performance　of　reinforced　concrete　shear　walls　under　multidimensional　loading　mode　and　its　effect　on　performance　improvement,　an　embedded　optimized　steel　plate-reinforced　concrete　composite　shear　wall　is　proposed.　Based　on　the　design　principle　that　the　shear　wall　could　adequately　bear　multi-dimensional　loading　and　the　embedded　steel　plate　could　reach　the　full　stress　state,　the　X-shaped　optimized　steel　plate　(for　in-plane　loading　mode)　and　the　triangular　optimized　steel　plate　(for　out-of-plane　loading　mode)　are　determined　using　different　optimization　methods.　The　combination　scheme　of　these　two　plates　is　utilized　in　the　oblique　loading　mode.　Quasi-static　loading　tests　are　conducted　on　eight　typical　shear　wall　specimens,　and　performance　parameters　such　as　hysteresis　curve,　skeleton　curve,　ductility,　stiffness　degradation,　strain　evolution,　and　damage　evaluation　of　the　specimens　are　compared　and　analyzed.　In　addition,　variable　parameter　analysis　is　performed　using　finite　element　software　to　compare　the　strain　distribution　state　of　each　steel　plate.　The　results　indicate　that　the　embedded　optimized　steel　plate-reinforced　concrete　composite　shear　wall　structure　exhibits　higher　bearing　capacity,　greater　deformation　capacity,　and　superior　energy　dissipation　capacity　under　different　loading　angles　compared　to　the　tradition　reinforced　concrete　shear　walls.　This　composite　structure　can　provide　greater　lateral　stiffness,　and　the　optimized　steel　plate　can　reach　the　full　stress　state　at　all　loading　angles,　effectively　reducing　the　damage　of　steel　bars　and　concrete.　These　findings　offer　a　foundation　for　the　study　of　seismic　performance　and　performance　improvement　methods　for　shear　wall　structures　under　multi-dimensional　earthquake　action.