For　the　connection　form　of　rebar　perforation　between　reinforced　concrete　beam　and　concrete-filled　steel　tube　(CFST),　the　effects　of　the　seismic　performances　of　CFST　columns　with　and　without　holes　by　rebar　penetration　on　the　tube　wall　and　reinforcement　for　the　holes　were　studied.　Low-cyclic　repeated　loading　tests　were　carried　out　on　three　full-scale　CFST　columns　with　diameter　of　610　mm.　Among　the　specimens,　one　is　designed　without　opening　holes,　another　is　with　opening　holes　and　the　last　one　is　with　opening　holes　and　reinforcements.　The　results　show　that　local　buckling　failure　is　occurred　for　the　specimen　without　opening　holes　at　the　location　of　100　mm　from　the　root　of　column.　The　failure　of　the　specimen　with　holes　is　the　buckling　and　tear　at　the　edge　of　holes.　Small　holes　by　rebar　penetration　have　little　influence　on　the　initial　stiffness　and　peak　load　capacity　of　the　CFST　column.　However,　after　the　peak　load,　due　to　the　tearing　damage　at　the　edge　of　holes,　the　stiffness　and　strength　of　the　specimen　deteriorate　rapidly,　and　both　the　ductility　and　energy　dissipation　capacity　of　the　specimen　decrease.　The　failure　position　of　the　CFST　column　with　reinforcement　is　located　at　90　mm　above　the　reinforcement　section,　and　this　specimen　shows　similar　seismic　performance　with　the　CFST　column　without　holes.　©　2019,　Editorial　Board　of　World　Earthquake　Engineering.　All　right　reserved.