The external PE anti-corrosion spiral steel pipe has improved the corrosion resistance and collision resistance of the outer wall of the steel pipe, and has played a good role in buried steel pipelines. It is widely used in oil, gas, water and other fields. Among them, the outer PE anti-corrosion spiral steel pipe used in the Henan section of the middle line of the South to North Water Diversion Project and the inner wall using fusion bonded epoxy anti-corrosion have been successfully applied in the supporting facilities of the South to North Water Diversion Project.