recycled　aggregate　concrete　made　with　recycled　aggregate　was　one　of　the　effective　ways　to　reuse　the　construction　and　demolition　waste.　Due　to　the　weak　complex　interface　transition　zone　of　recycled　aggregate　concrete,　the　defect　had　great　effect　on　the　bearing　capacity　and　durability　of　recycled　aggregate　concrete.　The　fracture　performance　of　recycled　aggregate　concrete　was　studied,　which　was　of　great　practical　significance　and　engineering　value.　The　wedge　splitting　test　of　200mm　×　200mm　×　230mm　specimens　was　carried　out　using　the　fatigue　testing　machine　(MTS).　The　elastic　modulus　of　the　specimens　were　measured　and　calculated　by　strain　gauge　and　dynamic　resistance　strain　gauge,　and　the　elastic　modulus　was　about　4GPa　lower　than　that　of　standard　test.　Based　on　double-K　fracture　model　of　recycled　aggregate　concrete,　the　crack　initiation　fracture　toughness　and　the　unstable　fracture　toughness　was　obtained.　The　test　results　show　that　the　replacement　level　of　recycled　aggregate　is　not　obvious　to　the　crack　initiation　fracture　toughness,　and　the　unstable　fracture　toughness　is　lower　than　that　of　natural　concrete.　Using　the　exponential　function　to　fit　the　tail　of　the　PH-COMD　curve　of　the　wedge　splitting　test,　it　is　found　that　the　fracture　energy　of　the　recycled　aggregate　concrete　is　not　reduced　with　the　increase　of　the　replacement　level　of　the　recycled　aggregate.　©　Published　under　licence　by　IOP　Publishing　Ltd.