This　study　systematically　evaluates　the　effects　of　freeze-thaw　cycles　on　the　compressive　performance　of　square　concrete-filled　stainless-steel　tubular　(CFSST)　stub　columns　through　rapid　freeze-thaw　tests.　This　research　was　performed　with　39　sets　of　test　specimens,　systematically　examining　the　critical　parameters　of　freeze-thaw　cycles　(0　to　100　cycles),　steel　tube　wall　thickness　(1.0　to　1.5　mm),　and　core　concrete　compressive　strength　(20　to　40　MPa).　The　research　findings　reveal　that,　as　the　number　of　freeze-thaw　cycles　increases,　the　ultimate　bearing　capacity　of　the　test　specimens　exhibits　a　decreasing　trend.　Notably,　when　the　number　of　freeze-thaw　cycles　accumulates　to　over　50　times,　the　magnitude　of　the　decrease　becomes　more　pronounced.　Furthermore,　concrete　of　higher　strength　and　stainless　steel　tubes　with　thicker　walls　were　found　to　markedly　enhance　freeze-thaw　resistance,　mitigating　the　loss　of　stiffness　and　ductility　in　the　specimens.　Based　on　regression　analysis,　a　predictive　model　for　the　ultimate　bearing　capacity　of　CFSST　stub　columns　under　freeze-thaw　conditions　has　been　developed.　Validation　confirms　that　the　proposed　model　achieves　high　accuracy　in　predicting　the　ultimate　bearing　capacity.　The　findings　of　this　study　provide　a　theoretical　foundation　for　the　design,　performance　evaluation,　and　maintenance　of　CFSST　structures　in　cold　regions.　©　2024