This product is a composite anti rust film produced by double layer co extrusion method. The outer layer is polyethylene, which can prevent external water vapor from entering, while the inner layer is a mixed layer of polyethylene and vapor phase corrosion inhibitor (VCI). When VCI vapor phase anti rust film is used to wrap metal products, the vapor phase corrosion inhibitor vaporizes and condenses on all metal surfaces, including difficult to reach surfaces such as holes, holes, and gaps, forming a vapor phase protective layer that cuts off water vapor, oxygen, and other substances in the air from contacting objects, disrupting the corrosion mechanism, and achieving anti rust effect.