This　paper　focuses　on　the　axial　compression　behavior　of　square　concrete-filled　steel　tube　(CFST)　stub　columns　subjected　to　freeze-thaw　cycles.　Freeze-thaw　cycles　significantly　affect　the　durability　and　performance　of　square　concrete-filled　steel　tube　(CFST)　stub　columns,　especially　in　cold　regions.　The　axial　compression　behavior　of　square　CFST　stub　columns　depends　on　the　number　of　freeze-thaw　cycles,　concrete　strength,　and　tube　thickness.　The　compiled　experimental　database　demonstrates　that　the　detrimental　effect　of　freeze-thaw　cycles　on　ultimate　bearing　capacity　becomes　progressively　more　pronounced　with　increasing　width-to-thickness　ratio.　Experimental　investigations　were　carried　out　on　nine　square　CFST　specimens　to　further　evaluate　the　axial　compressive　behavior　of　square　CFST　stub　columns　subjected　to　freeze-thaw　cycles.　Furthermore,　finite　element　(FE)　models　were　developed,　and　parametric　studies　were　carried　out.　Results　indicated　that　square　CFST　stub　column　typically　fail　due　to　local　buckling　of　the　steel　tube　and　concrete　crushing.　Freeze-thaw　cycles　induce　microcracks　in　the　concrete　and　weaken　the　interfacial　bond　between　the　steel　tube　and　concrete.　Ultimate　bearing　capacity,　ductility,　and　composite　elastic　modulus　decreased　with　increasing　the　number　of　freeze-thaw　cycles.　A　new　design　equation　was　proposed　to　predict　the　ultimate　bearing　capacity　of　square　CFST　stub　columns　subjected　to　freeze-thaw　cycles.　©　2025　Elsevier　Ltd