In　this　study,　biaxially　eccentric　compression　experiments　were　conducted　on　26　concrete-filled　square　stainless　steel　tubular　(CFSSST)　columns.　The　test　findings　showed　a　21.14　%　reduction　in　the　eccentric　compression　resistance　when　the　eccentricity　was　increased　from　0　to　40　mm.　When　the　slenderness　ratio　increased　from　10.39　to　41.56,　the　eccentric　compression　resistance　was　reduced　by　21.92　%.　When　the　cubic　compression　strength　of　the　concrete　was　increased　from　38.6　to　78.8　MPa,　the　eccentric　compression　resistance　increased　by　53.26　%.　A　corresponding　finite　element　(FE)　model　was　created,　and　the　FE　analysis　demonstrated　that　the　CFSSST　column　had　higher　peak　displacement,　bending　resistance,　and　ductility　than　the　conventional　concrete-filled　square　steel　tubular　(CFSST)　counterpart.　The　axial　load　vs　bending　moment　curves　for　the　CFSSST　and　CFSST　columns　were　fairly　similar.　However,　increasing　the　eccentric　angle　reduced　the　load　capacity　of　the　CFSSST　specimen　by　up　to　15.37　%.　Previous　simplified　methods　overestimated　the　carrying　capacities　of　CFSSST　specimens.　However,　the　revised　model　exhibited　higher　prediction　accuracy.　©　2024　Institution　of　Structural　Engineers