In order to explore the fracture performance of basalt fiber concrete (BFRC), the three-point bending beam method of the "Hydraulic Concrete Fracture Test Procedure" was used to fabricate concrete specimens with different fiber lengths and dosages with a joint height ratio of 0.4, and the MTS test was used. The machine carried out the loading test on the specimen, obtained the test results of the basalt fiber concrete three-point bending beam, and analyzed the fracture parameters such as P-CMOD curve, initiation toughness, instability toughness and fracture energy, and obtained the following conclusions: After the basalt fiber is added, the fracture performance of the specimen has been improved. The more the fiber content, the longer the fiber length, and the fuller the descending section of the P-CMOD curve; the specimen with a fiber length of 18mm and a content of 1.5% will start The improvement of fracture toughness and instability fracture toughness is the most obvious; the specimen with a fiber length of 12mm and a content of 1.5% has the largest fracture energy.