Method and device for repairing thin-wall part through cold spraying and thin-wall part

The invention relates to the field of thin-wall part repairing, and provides a method and device for repairing a thin-wall part through cold spraying and the thin-wall part, and the method comprises the steps that S1, the thin-wall part to be repaired is pretreated; s2, the part is placed in a shape follow-up heat preservation tool; and S3, cold spraying is conducted on the part, and laser accompanying annealing is conducted on the sprayed part of the part while cold spraying treatment is conducted. The device comprises a cold spraying unit, a laser heat treatment unit, an infrared temperature monitoring unit and a shape follow-up heat preservation tool. By designing laser heat treatment, the heat treatment position is accurately controlled, and it is guaranteed that the base material is not affected; residual stress is released in time by designing an accompanying heat treatment device, and large parts can be repaired; the shape follow-up heat preservation tool is designed to be attached to a to-be-repaired