Abstract: Agricultural irrigation consumes a large amount of water, and how to effectively conserve water is an important element in our country's strategy to realize sustainable development. Based on photovoltaic power generation technology, this paper designs a photovoltaic zero-carbon intelligent irrigation circuit, which realizes transmission between nodes through ZigBee communication module, effectively solving the communication problem in remote mountainous areas. At the same time, the residual photovoltaic power generation is stored in the form of pumped storage, which realizes the flexible regulation of electric energy. The system realizes precise regulation of watering according to the water demand of agricultural plants in different fertility periods, which makes the growth of agricultural plants more scientific and efficient.