Concrete-filled　double-skin　steel　tube　(CFDST)　columns　are　a　composite　structure　with　broad　application　prospects.　However,　the　seismic　behavior　of　their　beam-column　joints　has　not　been　fully　investigated.　This　paper　presents　a　new　type　of　steel　beam-stiffened　CFDST　column　joint　and　evaluates　its　seismic　performance　through　quasi-static　tests.　The　test　involves　three　types　of　joints:　steel　beam-traditional　CFDST　column　joint,　steel　beam-nonpenetrating　stiffened　CFDST　column　joint,　and　steel　beam-penetrating　stiffened　CFDST　column　joint.　The　results　indicate　that　the　addition　of　stiffening　ribs　significantly　enhances　the　bearing　capacity,　ductility,　energy　dissipation　capability,　and　stiffness　of　the　joint.　Based　on　the　test　results,　a　finite　element　model　is　established　and　its　accuracy　is　validated.　Further　parametric　studies　were　conducted　using　the　finite　element　model.　The　study　finds　that　the　yield　strength　of　the　outer　steel　tube　and　stiffening　ribs,　axial　compression　ratio,　and　hollow　ratio　have　a　notable　effect　on　the　seismic　behavior　of　the　joints.　In　contrast,　the　steel　beam-penetrating　stiffened　CFDST　column　joint　shows　more　stable　performance　under　various　influencing　factors.　©　2025　Elsevier　Ltd