Seventy　eight　dog-bone　shaped　ultra-high　performance　concrete　(UHPC)　tensile　specimens　were　designed　to　study　the　effects　of　single　steel　fiber　and　hybrid　steel　fiber　with　polyolefin　(PP)　fiber,　polyvinyl　alcohol　(PVA)　fiber,　glass　fiber　(GF),　polyester　(PET)　fiber,　and　basalt　fiber　(BF)　on　the　compressive　strength,　tensile　strength,　peak　strain,　and　fracture　energy　of　UHPC.　The　results　showed　that　hybrid　fiber　reinforced　UHPC　had　good　toughness　damage　characteristics,　which　reflected　the　strengthening　and　toughening　effects　of　different　fibers.　The　tensile　stress-strain　curves　of　hybrid　fiber　reinforced　UHPC　could　be　divided　into　the　rising　section　and　softening　section,　and　the　softening　section　was　significantly　influenced　by　the　type　and　volume　content　of　fibers.　Among　the　microfiber　(PVA　fiber,　GF,　and　BF),　GF　had　the　most　significant　strengthening　effect,　PVA　fiber　had　the　best　ability　to　improve　the　deformation　of　UHPC,　and　BF　had　the　most　significant　effect　on　the　improvement　of　fracture　energy.　Among　macrofiber　(PP　fiber,　PET　fiber),　PP　fiber　had　a　better　ability　to　improve　UHPC　deformation　than　PET　fiber,　but　both　were　lower　than　microfiber.　When　the　total　volume　content　of　steel　fiber　and　PVA　fiber　was　2.5%,　the　best　toughening　and　crack　resistance　effect　was　achieved　when　the　volume　content　of　steel　fiber　was　1.5%　and　the　volume　content　of　PVA　fiber　was　1.0%.　Combined　with　the　experimental　results,　the　UHPC　tensile　sigma-omega　curves　of　single　steel　fibers,　hybrid　steel-PVA　fibers,　and　hybrid　steel-PVA-PET　fibers　were　established,　and　the　predicted　curves　were　in　good　agreement　with　the　experimental　curves.