The　ultra-high　performance　concrete　(UHPC)　mixed　with　hybrid　fibers　has　excellent　mechanical　properties　and　durability,　and　the　hybrid　fibers　have　a　certain　impact　on　the　bearing　capacity,　deformation　capacity,　and　crack　propagation　of　beams.　Many　scholars　have　conducted　a　series　of　studies　on　the　bending　performance　of　prestressed　UHPC　beams,　but　there　are　few　studies　on　prestressed　UHPC　beams　mixed　with　hybrid　fibers.　In　this　study,　five　bonded　post-tensioned　partially　prestressed　UHPC　beams　mixed　with　steel　fibers　and　macro-polyolefin　fibers　were　poured　and　subjected　to　four-points　symmetric　loading　bending　tests.　The　effects　of　different　prestressing　degrees　and　prestressing　levels　on　the　load-deflection　curves,　crack　propagation,　failure　modes　and　ultimate　bearing　capacity　of　beams　were　discussed.　The　results　showed　that　flexural　failure　occurred　in　the　prestressed　UHPC　beams　with　hybrid　fibers,　and　the　integrity　of　specimens　was　good.　When　the　prestressing　degree　was　the　same,　the　higher　the　prestressing　level,　the　better　the　crack　resistance　capacity　of　UHPC　beams;　When　the　prestressing　level　was　90%,　increasing　the　prestressing　degree　was　beneficial　to　improve　the　crack　resistance　and　ultimate　bearing　capacity　of　UHPC　beams.　When　the　prestressing　degree　increased　from　0.41　to　0.59,　the　cracking　load　and　ultimate　load　increased　by　66.0%　and　41.4%,　respectively,　but　the　ductility　decreased　by　61.2%.　Based　on　the　plane　section　assumption　and　considering　the　bridging　effect　of　short　fibers,　the　cracking　moment　and　ultimate　bearing　moment　were　calculated,　with　good　agreement　between　the　test　and　calculated　values.　©　2024　Techno-Press,　Ltd.