The anti-corrosion system of the polyethylene anti-corrosion adhesive tape is composed of anti-corrosion tape, protective tape, patching tape, and a primer. The polyethylene adhesive tape is a strip-shaped anti-corrosion material co-extruded from a polyethylene base film and a heat-laminated adhesive layer primarily made of butyl rubber. It boasts excellent insulation, superior anti-corrosion performance, high mechanical strength, resistance to impact, aging resistance, low water absorption, ease of application, safety, hygiene, wide application range, and long service life. It is widely used for the external anti-corrosion of metal pipelines in various pipeline projects and facilities such as oil, petrochemical, electricity, metallurgy, urban gas pipelines, water supply, etc., providing efficient and long-lasting protection. It is also extensively applied for the external anti-corrosion of buried overhead metal pipelines in engineering projects like petrochemicals and coal.