This automatic irrigation system is able to change deserts into oasis, and improve grassland. It is featured by good irrigation effect, energy and water efficiencey, production-increasing and labor-saving, with sprinkling uniformity above 90%. The system may also work with fertilizer and pesticide. Besides, it is able to work over rolling land, with grade ability at 5~25%. All critical parts of the system are subjected to hot-dip galvanization so that the system is guaranteed to be anticorrosion for minimum 15 years.