Test　results　of　16　concrete-filled　double　skin　steel　tubular　(CFDST)　beam-columns　are　presented　in　this　paper.　Two　types　of　column　with　different　cross-sections　were　investigated,　i.e.　circular　hollow　section　(CHS)　inner　and　CHS　outer,　CHS　inner　and　square　hollow　section　(SHS)　outer,　respectively.　Other　parameters　explored　were　load　eccentricity,　slenderness　ratio　and　fire　exposure　time.　It　was　found　that　the　fire　exposure　had　significant　influence　on　the　performance　of　CFDST　beam-columns.　A　finite　element　(FE)　modelling　technique　was　then　developed　to　predict　the　structural　response　of　the　composite　members　after　exposure　to　fire.　Reasonable　agreement　is　obtained　between　the　predicted　load-deformation　curves　and　the　test　results.　It　is　therefore　possible　to　conduct　further　investigation　on　the　mechanisms　of　the　composite　beam-columns　by　using　the　FE　modelling.