This　paper　studied　the　axial　compression　behavior　of　the　steel　tube　reinforced　concrete　(STRC)　column,　which　consisted　of　inner　CFST　and　outer　RC　components.　Ten　specimens,　including　seven　STRC　columns,　two　RC　columns,　and　one　CFST　column　were　tested.　The　test　parameters　included　the　CFST　area　ratio　(inner　CFST　to　the　whole　section),　longitudinal　rebar　ratio　and　stirrup　space.　The　test　results　showed　that　the　compressive　behavior　of　STRC　column　with　a　CFST　area　ratio　of　0.04　was　close　to　that　of　the　RC　column,　and　the　compressive　behavior　of　the　STRC　column　with　a　CFST　area　ratio　of　0.13　was　between　that　of　the　RC　column　and　CFST　column.　The　finite　element　(FE)　models　were　developed　and　verified　by　test　results　to　investigate　the　effects　of　longitudinal　rebar　ratio　and　stirrup　space　on　the　axial　compression　behavior　of　STRC　column　with　various　CFST　area　ratios.　The　load　distribution　between　inner　CFST　and　outer　RC　components　was　analyzed.　The　FE　results　showed　that　the　effects　of　the　longitudinal　rebar　ratio　on　the　ultimate　load　of　STRC　column　were　related　to　the　CFST　area　ratio.　The　accuracy　and　applicability　of　the　five　methods　suggested　by　codes　for　predicting　the　ultimate　load　of　STRC　column　were　discussed　based　on　the　test　and　FE　results.