Axial　compressive　tests　of　14　round-ended　concrete-filled　stainless　steel　tubular（CFSST）stub　columns　after　the　electric　power　fire　were　carried　out.　Effects　of　the　height-to-width　ratio，fire　exposure　time，and　steel　ratio　on　the　residual　strength　of　the　round-ended　CFSST　stub　column　after　the　fire　were　analyzed.　The　test　shows　that　the　failure　modes　of　this　type　of　short　column　are　local　buckling，weld　cracking，and　concrete　crushing.　With　the　increase　in　fire　exposure　time　or　height-to-width　ratio，the　residual　strength　of　the　specimen　will　decrease.　The　bearing　capacity　of　the　round-ended　CFSST　specimen　was　reduced　by　7.8%-13.9%　after　120　min　of　fire.　The　finite　element（FE）model　was　then　established，and　the　model　can　simulate　the　measured　results　well.　A　theoretical　analysis　based　on　the　FE　model　was　carried　out，which　shows　that　the　initial　load　has　a　small　effect　on　the　residual　strength　of　this　composite　column.　Parametric　analysis　shows　that　when　the　strength　of　concrete　increases　from　30　MPa　to　90　MPa，the　strength　reduction　coefficient　of　column　decreases　by　15.8%.　When　the　cross-sectional　circumference　increases　from　1　228　mm　to　4　913　mm，the　strength　reduction　coefficient　of　column　increases　by　20.5%.　When　the　fire　exposure　time　increases　from　0　min　to　180　min，the　strength　reduction　coefficient　of　column　is　reduced　by　8%.　The　strength　reduction　coefficient　of　column　is　less　affected　by　the　steel　ratio，height-to-width　ratio，and　steel　strength.　Finally，a　design　method　for　the　residual　strength　of　the　CFSST　stub　column　after　the　electric　power　fire　was　proposed.　©　2024　Tongji　University.　All　rights　reserved.