The invention discloses a surface treatment method capable of improving corrosion resistance of an electrolytic copper foil and belongs to the technical field of electrolytic copper foil production. The treatment method comprises the steps: pretreating a raw foil, curing a plating solution, performing passivating treatment, spraying a coupling agent and the like. Tests show that performance of oxidation resistance, corrosion resistance, peel strength and the like of a 12 mu m copper foil product prepared by the technology disclosed by the invention can reach application requirements, and the 12 mu m copper foil product shows a good prospect and good application value.