The　axial　compressive　behavior　of　carbon　fiber　reinforced　polymer　(CFRP)-confined　post　heated　square　concrete　filled　steel　tube　(CFST)　stub　columns　is　experimentally　investigated　in　this　paper.　Twenty　CFRP-confined　post　heated　square　CFST　stub　columns　and　one　CFST　stub　column　left　untreated　at　ambient　temperature　were　axially　tested.　Subsequently,　the　failure　mode,　ultimate　strength,　load　versus　displacement　curves,　load　versus　strain　distribution　curves,　initial　stiffness,　and　ductility　of　the　specimens　were　obtained　and　analyzed.　The　maximum　temperature　(600　degrees　C,　800　degrees　C,1000　degrees　C,　1100　degrees　C)　CFST　stub　columns　exposed　to　and　the　number　of　the　layer　of　CFRP　sheets　(zero,　one,　two,　three　and　four)　were　considered　as　main　parameters.　The　test　results　showed　that,　in　general,　the　CFST　stub　columns　wrapped　with　CFRP　sheets　shown　a　better　mechanical　behavior　than　those　without　CFRP　sheets　wrapping.　Furthermore,　the　more　the　layers　of　CFRP　sheets　are,　the　higher　the　ultimate　strength　and　initial　stiffness　of　the　CFST　stub　columns　are.　Based　on　the　regression　of　the　test　data,　the　simplified　formulae　for　ultimate　strength　of　CFRP-confined　post　heated　square　CFST　stub　columns　was　proposed.　Accuracy　of　the　formulae　was　evaluated　by　comparison　between　the　calculated　and　experimental　results.