Concrete-filled　double　skin　steel　tubular　(CFDST)　columns　have　been　increasingly　applied　in　the　fields　of　bridge　and　building　construction　due　to　their　superior　structural　performance.　This　paper　experimentally　studied　the　compressive　behavior　of　square　CFDST　short　columns　with　double　internal　steel　tubes　(2　x　SHS　or　2　x　CHS).　The　influence　of　concrete　strength,　eccentricity　ratio,　and　section　hollow　ratio　on　the　strength,　deformation,　and　ductility　of　specimens　was　systematically　investigated.　Experimental　research　showed　that　the　concrete　strength　had　the　most　remarkable　impacts　on　the　ultimate　strength　of　the　column,　followed　by　the　section　hollow　ratio.　However,　the　effect　of　eccentricity　ratio　on　the　ultimate　strength　of　the　column　could　be　nearly　neglected.　The　ductility　of　the　column　was　positively　correlated　with　the　section　hollow　ratio,　which　was　completely　contrary　to　the　effect　of　concrete　strength.　Nevertheless,　the　eccentricity　ratio　negligibly　affected　the　ductility　of　the　column.　Furthermore,　comparisons　of　the　experimental　ultimate　strength　of　CFDST　columns　were　made　with　three　different　design　methods　(AISC-360,　Eurocode　4,　and　Han＇s　formulae).　The　design　formulae　suggested　by　Han　et　al.　(2009)　could　better　predict　the　ultimate　strength　of　CFDST　short　columns　with　double　internal　square　steel　tubes,　but　the　prediction　result　was　unconservative　to　some　extent.　Finally,　the　simplified　formulae　were　proposed　to　estimate　the　ultimate　strength　of　CFDST　short　columns,　which　could　authentically　reflect　the　combined　impacts　of　the　eccentricity　ratio　and　section　hollow　ratio.