This　paper　presents　an　experimental　study　on　tensile　behavior　of　steel　and　ultra-high　performance　concrete　(UHPC)　composite　structure　connected　by　different　connections　including　epoxy　resin　adhesive,　headed　stud,　and　hybrid　of　the　former　two.　Thirty-two　pull-out　tests　are　conducted　by　taking　the　connection　type,　specimen　size　and　steel　fiber　content　of　UHPC　as　the　main　parameters.　The　influences　of　these　main　parameters　on　the　failure　mode,　load-separation　behavior,　and　ultimate　resistance　of　connection　are　researched.　The　failure　modes　of　specimens　with　hybrid　connection　are　UHPC　interface　debonding　and　UHPC　cone　failure,　which　is　identical　with　the　epoxy　resin　adhesive　connection　and　headed　stud　connection,　respectively.　The　tensile　resistance　ratio　of　headed　stud　connection　to　epoxy　resin　adhesive　connection　has　a　significant　influence　both　on　the　separation　performance　and　tensile　resistance　of　hybrid　connection.　An　empirical　equation　for　predicting　the　tensile　resistance　of　hybrid　connection　was　proposed　by　taking　the　tensile　resistance　ratio　of　headed　stud　to　epoxy　resin　adhesive.　The　ratio　of　predicted　to　test　result　was　0.973with　standard　deviations　of　0.070.　The　pull-out　tests　and　analysis　of　the　hybrid　connection　in　steel-UHPC　composite　structure　were　still　needed　to　study　to　get　it　improved.