An　experimental　and　analytical　investigation　of　ultrahigh-performance　concrete　(UHPC)　plateconcrete-filled　steel　tubular　(CFST)　laced　composite　columns　are　presented　in　this　study.　A　total　of　11　stub　specimens　under　axial　compression　are　conducted　to　quantify　the　column　failure　mechanism.　Experimental　results　indicate　that　the　compressive　behavior　in　the　UHPC　plate　dominated　the　failure　mechanism　of　the　UHPC　composite　columns,　and　the　failure　mode　is　dependent　on　the　peak　strain　of　the　UHPC　plate　and　CFST　limb.　The　two　main　parameters　in　the　tests　are　the　thickness　of　the　steel　tube　(t)　and　UHPC　plates　(tp),　which　significantly　enhance　the　bearing　capacity　of　UHPC　composite　columns.　Herein,　the　finite　element　standard　model　is　established　to　investigate　the　influence　of　various　parameters　on　the　compressive　behavior　of　UHPC　composite　columns.　The　diameter　of　the　steel　tube　D　is　the　most　sensitive　parameter　affecting　the　structural　compressive　performance,　while　the　ratio　of　steel　reinforcing　bars　has　an　ignorable　influence　on　the　compressive　strength.　Based　on　the　ultimate　limit　states　and　parametric　analysis,　a　unified　formula　for　predicting　the　strength　of　UHPC　composite　columns　is　proposed,　which　is　generally　in　good　agreement　with　the　experimental　results.