Quasi-static　tests　of　two　full-scale　shear　wall　specimens　with　shear-span　ratio　of　1.5　were　conducted　under　low　reversed　cyclic　loading.　One　specimen　was　a　single　layer　reinforced　recycled　aggregate　concrete　shear　wall　with　expandable　polystyrene　(EPS)　insulation　blocks　and　mortar　layer,　while　the　other　one　without　insulation　blocks　and　mortar　layer.　Failure　feature　and　seismic　behavior　were　analyzed　and　compared　with　the　low-rise　shear　wall　(shear-span　ratio　is　1.0).　Based　on　softened　strut-and-tie　model　and　taking　mortar　layer　into　consideration,　shear　capacity　calculation　model　and　formula　of　single　layer　reinforced　recycled　aggregate　concrete　shear　wall　with　insulation　blocks　were　suggested.　The　conclusions　are　drawn　that　insulation　blocks　and　mortar　layer　can　improve　load-carrying　capacity　and　elasto-plastic　deformation　effectively,　especially　seismic　energy　dissipation　capacity.　Shear-span　ratio　has　a　great　influence　on　the　seismic　behavior　and　failure　feature　of　shear　wall.　Shear　wall　with　lower　shear-span　ratio　shows　shear-tensile　failure　with　web　main　diagonal　crack　and　shear　oblique　crack　at　the　bottom　of　the　flange.　While　shear　wall　with　higher　shear-span　ratio　shows　shear-compression　failure　with　web　main　diagonal　crack　and　crushing　of　concrete　at　the　bottom　of　the　flange.　The　suggested　shear　bearing　capacity　calculation　model　and　formula,　with　the　calculated　results　fit　well　with　the　measured　results,　can　be　used　for　the　shear　bearing　capacity　calculation　of　the　composite　shear　wall.　©,　2015,　Jianzhu　Jiegou　Xuebao/Journal　of　Building　Structures.　All　right　reserved.