The invention discloses a repairing method of a badminton racket frame, and belongs to the technical field of repairing of rackets. Specifically, the repairing method comprises the following steps: S1, cleaning internal filler in fractures of the racket frame, and implementing fracture surface and inner wall grinding; S2, mixing a steel bar planted adhesive; S3, making a pre-filling carbon fiber sheet provided with middle holes, and placing the pre-filling carbon fiber sheet on a tool cone; S4, winding a carbon fiber bundle on the surface of the carbon fiber sheet, and sticking the carbon fiber bundle with the steel bar planted adhesive, so that the carbon fiber filler (the carbon fiber sheet), which is wound, adapts to a to-be-filled space; S5, applying adhesives to the inner wall and fracture surface of the cleaned racket frame, filling the racket frame with the carbon fiber filler which is prepared in the step S4, and perforating the carbon fiber filler in the locations of two sideholes of the fracture after curing and binding; and S6, pulling out the tool cone, and inserting a wire inserting pipe for conducting threading. According to the repairing method provided by the invention, by filling the fracture of the racket frame in a mode of winding the carbon fiber bundles outside the carbon fiber sheets and by perforating the middle holes in the carbon fiber sheet, the repaired badminton racket frame is firm and high in intensity, and repeated fracture, which can occur easily, can be prevented.