The invention discloses a method for electro-coating a stamping part. The method comprises the following operation steps: (1) after cleaning the stamping part, spraying a degreasing and modifying liquid onto the surface of the clean stamping part for 20-30 min, and thoroughly cleaning the stamping part sprayed with the degreasing and modifying liquid by adopting clear water; (2) electro-coating the thoroughly clean stamping part; and (3) cleaning the electro-coated stamping part by adopting a cleaning liquid, and carrying out drying treatment to obtain a finished product, wherein a sodium fluoborate solution with a mass fraction of 3-5% serves as the cleaning liquid. For the stamping part produced by adopting the method provided by the invention, the film layer on the surface is uniform and relatively thick; the erosion-resistant property and the abrasion-resistant property are more excellent; and the surface of the film layer is relatively dense as well as free of roughness and pinholes.