Abstract: Intelligent agricultural irrigation system will be one of the main means to solve the contradiction between supply and demand of agricultural water resources in China. In order to further improve the utilization rate of agricultural water, an automatic irrigation system based on sensor and automatic control technology is designed. The application of automatic irrigation system will realize the unattended irrigation process, reduce the work intensity of personnel, improve the irrigation efficiency, with good adaptability,easy to use, high reliability, and has certain popularization value.