Deconstructable　composite　beams,　in　which　bolted　connectors　are　introduced　between　prefabricated　concrete　slabs　and　steel　beams,　offer　promising　demolition　efficiency.　Compared　with　conventional　cast-in-situ　composite　floor　systems,　such　novel　composite　beams　provide　favourable　economic　performance　and　sustainability　by　considerably　improving　the　recyclability　of　structural　components.　In　this　study,　four　full-scale　deconstructable　beam-to-column　composite　joints　with　deconstructable　beams　were　designed,　manufactured,　and　tested　under　monotonic　and　cyclic　loading.　The　structural　performances-crack　pattern,　failure　mode,　strain　distribution　and　moment-rotation　response,　energy　dissipation,　and　deterioration　evolution-were　investigated　thoroughly.　The　effects　of　the　loading　scheme　and　a　force-transmission　sleeve　on　the　structural　performances　were　simultaneously　studied.　The　moment-rotation　responses　showed　that　the　composite　joints　possess　outstanding　strength,　rotation　capacity,　ductility,　and　energy　dissipation　ability.　The　deformability　satisfies　the　minimum　rotation　capacity　specified　by　Eurocodes　3　and　4.　Strain　analysis　demonstrated　that　the　composite　beams　provide　favourable　composite　shear　interactions.　The　installation　of　the　force-transmission　sleeve　improved　the　strength　of　a　com-posite　joint　owing　to　the　incorporation　of　steel　bars　split　by　the　column　into　the　moment-resisting　system.　These　deconstructable　composite　joints　can　achieve　favourable　deconstructability　and　demolition　efficiency　at　the　termination　of　service　life,　and　thus,　serve　as　novel　structural　members.