Abstract: In order to solve the power supply problem of agricultural Internet of Things monitoring equipment in the field environment,a set of agricultural Internet of Things power supply system based on pipe flow generation is designed. The system completes the design of turbine and generator under the working conditions of pipe flow rate of 1.5 m/s and internal water pressure of 200 kPa. On this basis,the system circuit,I/O extended module and control strategy are designed to realize the stable power supply to the monitoring equipment. Through the test measurement,the battery power consumption in 24 h is 43% under the condition of no charge. Irrigation for 8 h per day,the lowest power is69%,and the highest power is 100% within 24 h. The system has a low cost,generates as expected,and can continuously and steadily supply power to agricultural Iot equipment.