The　preparation　process　of　quartz　sand　(QS)　can　cause　serious　environmental　pollution,　which　is　particularly　important　to　find　a　new　replacement　material　for　QS　in　cement-based　construction　materials.　In　this　study,　an　economical　and　environmentally　friendly　ultra-high　performance　glass　sand　concrete　(UHPGC)　was　prepared　by　partially　replacing　QS　in　conventional　ultra-high　performance　concrete　(UHPC)　with　glass　sand　(GS)　ground　from　waste　glass.　The　effects　of　material　composition　characteristics　including　water-binder　ratio　(W/B),　GS　replacement　ratio,　and　steel　fiber　content　on　the　flexural　and　fracture　characteristics　of　UHPGC　notched　beams　were　investigated　based　on　response　surface　method　(RSM)　and　acoustic　emission　(AE)　monitoring.　The　results　indicate　that　the　GS　replacement　rate　presents　almost　no　effect　on　the　tensile　strength　and　flexural　toughness　of　the　specimens　while　reducing　the　water-binder　ratio　or　increasing　the　steel　fiber　content　can　significantly　improve　the　flexural　tensile　strength　of　UHPGC　notched　beams.　UHPGC　notched　beams　show　the　best　performance　when　the　W/B　is　0.17,　the　steel　fiber　content　is　3　%,　and　the　GS　replacement　rate　is　50　%.　By　analyzing　and　comparing　the　AE　parameters　and　fracture　modes,　the　discrepancies　in　flexural　and　fracture　properties　of　UHPGC　notched　beams　with　variable　material　composition　characteristics　can　be　elucidated.　Among　them,　the　low　waterbinder　ratio　or　high　steel　fiber　content　has　a　significant　effect　on　the　fracture　characteristics　and　fracture　process　of　the　specimens,　while　the　GS　replacement　rate　exhibits　negligible　effect.