Method and device for repairing surface defects of metal part

The invention discloses a method for repairing surface defects of a metal part, which comprises the following steps: pretreating the surface defects of the metal part, filling the surface defects of the metal part with a repairing material, heating the repairing material until the repairing material is molten, so that the surface defects of the metal part are filled with the molten repairing material, and cooling to a normal temperature state. The repairing material is solidified, filling and repairing are completed, and post-treatment is conducted on the repaired metal part; the invention further discloses a device for repairing the surface defects of the metal part, and the device comprises a pretreatment module, a filling module, a heating module and a repairing module based on the method for repairing the surface defects of the metal part. The method has the beneficial effects that low-temperature repair can be carried out on large-size defects, the binding force between the repaired position and the meta