In　this　study,　an　innovative　reinforced　concrete-filled　stainless　steel　tube　(RCFSST)　column　is　proposed.　A　total　of　twenty-two　specimens,　including　eighteen　RCFSST　stub　columns　and　four　concrete-filled　stainless　steel　tube　(CFSST)　stub　columns　were　tested　under　axial　compression.　The　primary　variables　included　cross-section　type　(circular　and　square),　spiral　stirrup　spacing　(spiral　stirrup　ratio),　number　and　strength　of　longitudinal　reinforcing　bars,　and　concrete　strength.　The　failure　modes,　load　versus　deformation　curves,　ultimate　bearing　capacity,　strain　characteristics,　local　buckling　stress,　and　ductility　of　the　specimens　were　compared　and　discussed.　Results　showed　that　the　load　versus　deformation　curves　were　stable,　and　outward　buckling　was　the　final　failure　mode　for　all　specimens.　Compared　with　CFSST　columns,　RCFSST　columns　had　higher　ultimate　bearing　capacity　and　better　ductility.　Increasing　the　spiral　stirrup　ratio　can　significantly　improve　ultimate　bearing　capacity　and　post-peak　ductility.　Increasing　the　number　and　strength　of　longitudinal　reinforcing　bars　can　also　increase　ultimate　bearing　capacity.　Higher　concrete　strength　can　improve　the　ultimate　bearing　capacity　of　the　specimen　but　worsen　post-peak　ductility.　Inserting　a　reinforcement　cage,　even　a　small　amount,　can　be　an　economical　method　of　significantly　improving　the　ductility　of　CFSST　columns　with　high　strength　concrete.　Finally,　design　formulas　for　calculating　the　ultimate　bearing　capacity　of　RCFSST　columns　subjected　to　axial　compression　loading　were　proposed.