With　the　merits　of　low　carbon　emission　and　energy　consumption,　cement　bitumen　emulsion　mixture　(CBEM)　is　more　and　more　preferred　in　the　construction　and　rehabilitation　of　pavement　engineering.　However,　CBEM　has　a　high　risk　of　cracking　damage　due　to　the　inappropriate　addition　of　cement.　To　deeply　know　and　then　reasonably　design　the　cracking　resistance　of　CBEM,　the　fracture　behaviour　of　CBEM　is　studied　by　a　semi-circular　bending　test,　and　the　global　displacement　and　strain　of　the　specimen　during　the　whole　loading　process　are　measured　through　digital　image　correlation　(DIC).　The　results　indicate　that　the　three　fracture　stages　of　CBEM　(i.e.　crack　initiation,　crack　propagation　and　failure)　can　be　accurately　identified　by　DIC　data.　The　maximum　value　of　the　mean　global　horizontal　strain,　representing　that　the　specimen　affords　the　maximum　tension　energy,　is　proposed　to　identify　the　fracture　failure　point　for　the　accurate　calculation　of　fracture　parameters.　The　fracture　energy,　J　integral　and　fracture　toughness　of　CBEM　increase　and　then　decrease　with　the　increasing　cement　dosage.　To　obtain　a　good　comprehensive　fracture　behaviour　for　CBEM,　it　is　recommended　that　cement　dosage　can　be　between　2%　and　3%,　and　the　optimum　cement　dosage　is　2.6%.