Outer buckle bolt repairing tool

The utility model discloses an externally-buckled bolt repairing tool which is used for repairing a bolt and comprises a mounting support which is of an integrally-formed L-shaped structure. The saw blade is obliquely mounted at the opening of the mounting bracket to form a containing space for placing a bolt; one end of the saw blade is fixedly connected to the mounting bracket; the other end of the saw blade extends out of the mounting bracket and moves up and down to form an increased or decreased accommodating space; one side of the saw teeth of the saw blade moves to be embedded with the threaded notch of the bolt to form friction motion; the two ends of the limiting spring are connected to the mounting bracket and the saw blade extending end respectively; the extending end of the saw blade moves up and down to form stretching or contracting of the limiting spring; the device is simple in structure and convenient to operate, and can adapt to repair work of bolts with different sizes through matched use o