To　make　comparative　study　on　spatial　mechanical　properties　of　RC　shear　wall　with　single　row　of　steel　bars　and　that　with　double　rows　of　steel　bars,　an　experiment　has　been　introduced　in　the　article,　in　which　low　cyclic　reversed　unidirectional　load　has　been　applied　to　a　model　of　1/2　scale.　In　the　model,　bi-directional　steel　bars　of　double　rows　have　been　designed　to　one　side　while　those　of　single　row　to　another.　What＇s　more,　a　vertical　load　has　been　exerted　in　the　center　of　the　slab　evenly　with　a　set　of　force-transmitting　structure.　Based　on　the　experiment,　the　load-carrying　capacity,　hysteretic　behavior,　stiffness,　out-plane　performance　of　the　shear　wall　and　failure　phenomena　have　been　discussed.　Besides,　vertical　load-carrying　capacity　has　been　calculated　with　yield-line　theory.　It＇s　shown　that　hysteretic　behavior　and　out-plane　deflection　of　both　sides　are　much　similar　while　the　slab　under　a　vertical　load.　And　that　still　goes　well　when　the　slab　seriously　damaged　under　extreme　load,　as　the　result　of　the　collaboration　of　the　web　and　flange.　That　is　to　say　that　the　binding　force　on　the　slab　of　both　sides　is　almost　the　same,　so　does　to　the　out-plane　performance　of　the　shear　wall.　Therefore,　rational　designed　RC　shear　wall　with　single　row　of　steel　bars　can　satisfy　seismic　demand.