Glass　fibre-reinforced　polymer　(GFRP)　from　waste　wind　turbine　blades　is　expected　to　improve　the　fracture　toughness　of　concrete.　Based　on　this,　the　effect　of　different　lengths　and　dosages　of　discarded　GFRP　fibres　on　concrete　compatibility　and　compressive　strength　was　explored.　In　addition,　the　fracture　toughness　of　GFRP　concrete　(GFRC)　beam　was　evaluated　more　visually　by　the　three-point　bending　test　coupling　the　digital　image　correlation　(DIC)　and　acoustic　emission　(AE)　techniques.　Finally,　scanning　electron　microscopy　(SEM)　and　X-ray　diffractometry　(XRD)　were　used　to　reveal　the　reinforcement　mechanism.　The　results　showed　that　fibre　incorporation　decreased　the　compatibility　of　concrete　by　up　to　54.69　%;　fibre　lengths　of　4　cm　and　6　cm　increased　the　compressive　strength　of　concrete　by　up　to　37.1　%,　while　fibre　lengths　of　8　cm　decreased　the　compressive　strength　of　concrete　by　up　to　13.98　%.　The　results　of　both　AE　and　DIC　tests　demonstrated　that　increasing　fibre　length　and　doping　induced　an　increase　in　the　number　and　dispersion　of　microcracks　within　the　GFRC,　and　concentrated　near　the　crack　development.　In　addition,　the　inclusion　of　fibres　significantly　improved　the　fracture　toughness　of　concrete,　for　the　fracture　energy　also　increased,　of　which　GFRC8-1.5　fracture　energy　is　the　largest,　is　7.76　times　that　of　the　plain　concrete.　The　microscopic　test　results　indicated　that　the　GFRP　fibres　have　both　a　strong　alkali　resistance　and　a　good　synergy　with　the　cement　matrix.　This　study　provides　some　theoretical　guidance　for　the　feasibility　of　application　in　recycled　wind　turbine　blade　concrete.