To　investigate　the　seismic　performance　of　double-skin　concrete-filled　steel　tubular　(CFST)　columns,　a　quasi-static　test　was　conducted　for　6　specimens　with　3　section　forms　and　2　shear　span　ratios,　and　the　same　vertical　load　was　applied　to　each　specimen.　The　steel　components　of　the　specimens　were　set　as　circular　steel　tube,　double-skin　steel　tube,　and　double-skin　steel　tube　with　cavity　welded　steel　plate.　Failure　mode,　hysteresis　characteristics,　bearing　capacity,　stiffness　degradation,　ductility,　and　energy　consumption　of　the　specimens　were　analyzed.　Test　results　indicate　that　except　for　the　single-cavity　CFST　column　with　shear　span　ratio　of　2.2,　the　hysteretic　curves　of　the　other　specimens　are　plump　and　the　seismic　performance　is　stable.　The　hysteretic　curves　of　the　specimens　with　the　same　drift　ratio　can　be　plumper　by　increasing　the　section　steel　ratio　or　the　shear　span　ratio.　Setting　the　inner　steel　tube　and　the　cavity　welded　steel　plate　can　improve　the　bearing　capacity,　and　it　can　greatly　enhance　the　ductility　of　the　specimens　with　smaller　shear　span　ratio.　The　initial　stiffness　can　be　significantly　improved　by　reducing　the　shear　span　ratio,　but　the　stiffness　degradation　rate　is　faster,　and　the　cumulative　damage　effect　is　more　significant.　When　the　construction　is　set,　the　cumulative　energy　dissipation　of　the　specimens　with　small　shear　span　ratio　is　higher　when　the　ultimate　drift　ratio　is　reached.　Compared　with　the　experimental　results,　the　calculation　results　of　the　practical　bearing　capacity　of　the　CFST　column　adopted　in　this　study　are　conservative.　©　2019,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.