Abstract: To accelerate IT application and digitization in agricultural production, save water resource, reduce energy consumption, improve the quality and efficiency of irrigation, and promote control and management level, the authors used LEVI102A touch screen as human- machine interface, Delta DVP60ES2 PLC (Programmable Logic Controller) as control core to build an automatic irrigation control system. The system could not only control the opening or closing of the pump motor and solenoid valve according to the water content in soil and soil water content set by the user and stop irrigating on rainy days automatically, but also irrigate automatically according to the time set by the user. The system realized the automatic monitoring function of irrigation, saved manpower and water, improved the quality and efficiency of irrigation, had the advantages of low cost, stable and convenient operation, simple maintenance and friendly human-machine interface and had broad application prospects and practical value.