Different　aggregate　gradations　of　asphalt　concrete　possess　dissimilar　skeleton　structures,　leading　to　diverse　macroscopic　and　mechanical　characteristics.　Acoustic　emission　(AE)　technology　can　realize　real-time　monitoring　of　the　whole　damage　evolution　process　of　materials.　The　objective　of　the　present　investigation　was　to　demonstrate　the　fracture　characteristics　of　asphalt　concrete　with　three　types　of　aggregate　gradations,　including　dense-graded　asphalt　concrete　(AC),　stone　mastic　asphalt　(SMA),　and　open-graded　friction　course　(OGFC)　under　indirect　tensile　load　on　account　of　the　acoustic　emission　(AE)　technique.　The　Marshall　compaction　method　was　used　to　prepare　specimens,　and　the　indirect　tensile　test　(IDT)　and　AE　monitoring　were　conducted　simultaneously　at　different　temperatures.　The　corresponding　AE　parameters　containing　energy,　cumulative　energy,　count,　and　cumulative　count　were　adopted　to　characterize　the　fracture　process　of　asphalt　concrete　with　different　aggregate　gradations.　The　impact　of　temperature　on　the　damage　characteristics　of　asphalt　concrete　was　also　assessed.　Test　results　indicated　that　the　AE　parameters　could　effectively　classify　the　damage　stages　of　asphalt　concrete,　and　specimens　with　different　aggregate　gradations　exhibited　different　AE　characteristics　during　failure　processes.　The　combination　of　AE　parameters　and　cumulative　AE　parameters　can　accurately　characterize　the　damage　characteristics　of　asphalt　concrete.　SMA　specimens　possessed　the　best　overall　performance　among　these　three　types　of　asphalt　concrete　in　terms　of　the　variations　in　energy　and　cumulative　energy　at　different　temperatures.　The　findings　obtained　in　this　study　can　provide　a　practical　AE-based　evaluation　approach　for　demonstrating　the　fracture　mechanism　of　asphalt　concrete　with　different　aggregate　gradations.