An　ecological　ultra-high-performance　glass　sand　concrete　(UHPGC)　was　prepared　by　partially　replacing　quartz　sand　in　traditional　ultra-high-performance　concrete　(UHPC)　with　glass　sand　recycled　from　waste　glass.　The　four-point　bending　tests　of　UHPGC　notched　beams　with　different　notch-depth　ratios　(0.2,　0.3,　0.4,　and　0.5)　were　carried　out,　while　acoustic　emission　(AE)　monitoring　was　employed　at　the　whole　fracture　process.　Flexural　toughness　and　residual　flexural　tensile　strength　were　used　to　evaluate　the　flexural　properties.　Meanwhile,　fracture　energy　and　fracture　toughness　were　used　to　evaluate　the　fracture　properties.　The　results　reveal　that　notch-depth　ratio　exhibits　a　significant　effect　on　the　flexural　and　fracture　performances　of　UHPGC　notched　beams.　The　residual　flexural　tensile　strength,　flexural　toughness,　fracture　energy　and　fracture　toughness　decrease　with　the　increase　of　notch　depth.　Moreover,　AE　energy　parameters　can　favorably　characterize　the　differences　of　energy　release　in　the　fracture　processes　of　UHPGC　beams　with　different　notch　depths,　and　favorable　correlations　are　observed　between　cumulative　AE　energy　and　fracture　energy.　Besides,　AE　wavelet　entropy　are　constructed　based　on　wavelet　packet　transform　(WPT)　of　AE　waveforms,　and　the　evolution　model　of　wavelet　entropy　is　established.　By　comparing　with　the　evolution　process　of　AE　energy　information　entropy,　it　is　proved　that　the　maximum　point　of　wavelet　entropy　can　be　used　as　the　key　point　to　predict　the　peak　load.　©　2023