To　study　the　difference　of　axial　compressive　performance　of　highstrength　recycled　concrete-filled　steel　tube(CFST)　columns　and　highstrength　normal　CFST　columns,　five　specimens　were　designed　to　test　under　axial　loading,　and　the　different　section　shape,　concrete　type　and　internal　structure　were　regarded　as　major　variable　parameters.　Through　the　experiment,　the　influence　of　concrete　type,　section　shape　and　steel　reinforcement　cage　on　the　load-bearing　capacity,　energy　dissipation　and　ductility　of　the　specimens　were　analyzed.　The　test　results　indicate　that　the　damage　development　and　failure　mode　of　recycled　concrete-filled　steel　tube　columns　are　similar　to　those　of　normal　CFST　columns.　With　the　same　cross-sectional　area,　steel　ratio　and　material　strength,　circular　section　specimens　have　higher　load-bearing　capacity　and　better　deformability　than　square　section　specimens.　Concrete　types　have　little　influence　on　axial　compressive　mechanical　properties　of　square　section　specimens.　The　steel　reinforcement　cage　inside　the　square　section　specimen　strengthens　the　confinement　to　core　concrete,　therefore　the　bearing　capacity　and　deformability　are　improved　significantly.　According　to　the　relevant　regulations　at　home　and　abroad,　the　ultimate　bearing　capacity　of　the　specimens　were　calculated　and　analyzed.　Considering　size　effect,　the　bearing　capacity　calculation　formula　is　proposed　for　square　concrete-filled　steel　tube　columns,　and　the　calculation　results　agree　well　with　the　test　results.　©,　2015,　Science　Press.　All　right　reserved.