This　paper　presents　experimental　investigations　on　axial　mechanical　properties　of　circular　concrete-filled　stainless　steel　tube　(CFSST)　columns　after　exposure　to　temperature　and　sliding.　A　total　of　117　CFSST　specimens　were　tested　under　axial　compression　loading　with　four　factors　(i.e.,　tube　thickness,　temperature,　duration,　and　concrete　compressive　strength)　considered.　Test　results　indicated　that　the　initial　stiffness　of　circular　CFSST　short　columns　was　degenerated　due　to　high-temperature　sliding.　Circular　CFSST　specimens　exhibited　a　50.9%　lowest　residual　strength　at　1000　degrees　C.　The　influence　of　high-temperature　duration　on　the　residual　strength　of　circular　CFSST　short　columns　was　limited.　The　residual　strength　of　specimens　was　positively　correlated　with　the　thickness　and　concrete　compressive　strength.　All　circular　CFSST　columns　after　exposure　to　temperature　and　sliding　experienced　an　outward　local　buckling　under　axial　compression.　In　addition,　the　parameters　formulae　of　residual　strength　for　circular　CFSST　columns　after　exposure　to　temperature　and　sliding　are　proposed,　which　achieve　sufficient　accuracy.　The　research　could　offer　valuable　references　for　strengthening　circular　CFSST　columns　after　fire.