Repairing knife

The utility model provides a repair knife which comprises a knife head, a knife handle and a shielding piece, the knife head is provided with a knife edge, and the knife head is connected with the knife handle; the shielding piece is movably connected with the tool bit and used for adjusting the shielding part of the shielding piece to the blade in the extending direction of the blade. During use,the shielding part is used for shielding the part, not in contact with skin tissue, of the cutting edge, in the skin removing process of the operation repairing knife, at least part of the position,not in contact with the skin tissue, of the cutting edge can be shielded by the shielding part, the probability that an operator makes contact with the cutting edge is reduced, safety is improved, andthe risk of scratching is reduced. Meanwhile, the shielding piece can move relative to the knife head, the position of the shielding piece can be adjusted in real time in the peeling operation process, and the repairing knife