The　accurate　prediction　of　the　concrete　confinement　effects　in　concrete-filled　double-skin　steel　tubular　(CFDST)　columns　composed　of　a　circular　section　is　vital　in　stimulating　their　true　structural　performance.　However,　existing　concrete　confinement　models　for　such　columns　were　developed　based　on　limited　studies　and　may　not　accurately　predict　their　axial　responses　under　axial　loading.　In　this　paper,　a　numerical　model　is　developed　to　study　the　nonlinear　performance　of　axially-loaded　short　CFDST　columns　incorporating　an　accurate　concrete　confinement　model.　Herein,　a　novel　expression　to　calculate　the　lateral　confining　pressure　on　the　confined　concrete　of　the　CFDST　column　is　proposed　considering　the　influences　of　a　wide　range　of　important　column　parameters.　Furthermore,　a　reduction　factor　to　accurately　predict　the　post-peak　behavior　of　confined　concrete　is　suggested　based　on　the　previous　test　results.　The　accuracy　of　the　numerical　model　incorporating　the　proposed　concrete　confinement　model　is　verified　against　the　experimental　tests.　The　accuracy　of　the　existing　concrete　confinement　models　is　also　evaluated　and　compared　with　the　one　proposed　in　this　study.　It　is　demonstrated　that　the　proposed　confinement　model　can　yield　the　axial　performance　of　CFDST　columns　more　accurately.　A　parameter　study　is　then　performed　to　analyze　the　impacts　of　important　column　parameters　on　the　axial　performance　of　such　a　column.　The　applicability　of　the　existing　design　standards　in　designing　CFDST　columns　is　verified.　Lastly,　a　simple　and　accurate　design　equation　to　quantify　the　ultimate　axial　load　is　proposed.