Circular　concrete-filled　double　steel　tubular　(CFDST)　beam-columns　have　increasingly　been　used　in　tall　composite　structures　and　must　be　designed　for　fire　safety.　However,　there　is　a　lack　of　appropriate　design　methods　for　the　fire　safety　design　of　such　composite　beam-columns　because　research　work　on　their　fire　performance　has　been　very　limited.　This　paper　studies　the　behavior　and　design　of　circular　CFDST　beam-columns　under　eccentric　loading　and　fire　exposure.　The　standard　fire　tests　and　results　are　reported　on　CFDST　beam-columns　subjected　to　eccentric　loads.　A　numerical　model　developed　using　ABAQUS　is　described　for　simulating　the　fire　performance　of　CFDST　beam-columns,　which　accounts　for　the　concrete　transient　creep　using　the　user-subroutine　UEXPAN.　The　finite　element　simulation　technique　is　employed　to　study　the　fire　behavior　of　circular　CFDST　beam-columns　having　various　parameters.　A　method　is　proposed　for　calculating　the　strength　of　CFDST　beam-columns　in　a　fire　condition.　The　results　demonstrate　that　increasing　the　column　slenderness,　eccentricity　ratio,　and　axial　load　ratio　significantly　reduces　the　fire　resistance　time　and　capacity　of　CFDST　beam-columns.　Increasing　the　material　strength　considerably　improves　the　fire　resistance　of　filled　composite　columns.　The　developed　finite　element　simulation　model　predicts　well　the　behavior　of　CFDST　beam-columns　exposed　to　fire.　The　proposed　method　can　yield　satisfactory　strength　calculations　of　CFDST　beam-columns,　suggesting　that　it　can　be　utilized　in　practical　design　of　such　composite　beam-columns　for　fire　safety.　©　2024　The　Author(s)