In　this　paper,　three-point　bending　tests　on　precast　notched　beam　and　multiscale　numerical　simulation　were　used　to　evaluate　and　predict　the　effect　of　different　Basalt　Fiber　(BF)　dosages　on　the　fracture　resistance　performance　for　Basalt　Fiber　Reinforced　Concrete　(BFRC).　The　three-point　bending　test　was　performed　on　a　series　of　the　notched　beams　in　different　sizes　and　volumetric　fiber　dosage　to　obtain　the　Load-Crack　Mouth　Opening　Displacement　(P-CMOD)　curves　during　the　loading　process.　The　fracture　energy　and　the　double-K　fracture　parameters　were　calculated　from　P-CMOD　curves　to　investigate　the　influences　of　fiber　volume　fraction　and　beam　size　on　fracture　parameters　of　BFRC.　The　results　indicate　that　the　numerical　simulation　results　are　in　good　coherence　with　the　experimental　results.　The　increase　of　BF　dosage　could　markedly　increase　the　peak　load　and　the　fracture　energy　of　concrete.　There　was　no　size　effect　on　fracture　energy.　Based　on　the　two-parameter　fracture　theory,　the　initiation　toughness　had　size　effect　and　increased　with　the　rise　of　specimen　height,　while　size　effect　was　not　significant　for　unstable　toughness.　With　the　augment　of　fiber　dosage,　the　initiation　toughness　increased　linearly.　The　unstable　toughness　varied　irregularly　with　the　alteration　of　fiber　dosage　but　higher　than　that　of　ordinary　concrete.　In　addition,　this　paper　developed　a　homogenization　algorithm　based　on　Mori-Tanaka　and　a　multi-scale　finite　element　simulation　based　on　continuum　progressive　damage　theory　to　evaluate　and　predict　the　fracture　behavior　of　BFRC　with　different　sizes　and　fiber　volumetric　dosages.　The　calculated　P-CMOD　curves　from　this　algorithm　were　in　good　agreement　with　those　from　experiments　and　revealed　the　effects　of　fiber　dosage　and　size　effect　on　fracture　behavior　for　BFRC.　(C)　2019　Published　by　Elsevier　Ltd.