To　address　the　challenges　posed　by　the　excessive　exploitation　of　natural　river　sand,　manufactured　sand　(MS)　was　used　as　a　substitute　material　for　natural　sand　to　produce　manufactured　sand-based　ultra-high　performance　concrete　(UHPMC).　This　study　aims　to　investigate　the　effects　of　MS　replacement　ratio,　stone　powder　content,　steel　fiber　content,　and　steel　fiber　shape　on　the　fracture　characteristics　and　damage　evolution　of　UHPMC　under　tensile　load　through　tensile　tests　combined　with　acoustic　emission　(AE)　technology.　The　research　results　indicated　that　the　stress-strain　behavior　of　UHPMC　could　be　divided　into　low　strain　hardening,　low　strain　softening,　and　high　strain　softening.　The　tensile　strength　and　energy　absorption　of　the　UHPMC　were　less　correlated　with　MS　replacement　ratio.　The　tensile　strength　showed　a　trend　of　first　increasing　and　then　decreasing　with　the　increase　of　stone　powder　content,　and　UHPMC　with　a　4%　stone　powder　content　presented　the　better　tensile　strength.　The　tensile　damage　process　of　UHPMC　was　mainly　concentrated　in　the　range　of　tensile　strain　from　0.0002　to　0.0025.　The　microstructure　analysis　of　the　UHPMC　matrix　revealed　that　an　optimal　amount　of　stone　powder　enhances　the　bond　property　between　MS　and　mortar,　thereby　improving　tensile　performance.　AE　monitoring　indicated　that　AE　amplitude　and　AE　energy　provide　sensitive　identification　capabilities　for　classifying　the　elastic　state,　strain　hardening,　and　strain　softening　stages　of　UHPMC.　The　findings　of　this　study　contribute　to　understanding　the　fracture　characteristics　and　damage　evolution　of　UHPMC,　promoting　the　engineering　application　of　MS　in　ultrahigh-performance　concrete.