There are abundant solar energy resources in northwest China. Based on this, this paper aims to study the photovoltaic pumping drip irrigation system based on the Internet of Things and MCU. According to the research, this system is very suitable for the regional characteristics of Northwest China and improves the utilization rate of water resources. The system uses SCM, water pump and other modern technology to feed back the collected parameters such as temperature, humidity and PH value to the mobile APP in order to conduct the big data analysis and finally to the system for the whole operation. At the same time, the electric energy of the whole system comes from solar energy, realizing clean and efficient irrigation, thus saving time and effort, reducing the waste of water resources and effectively alleviating the problem of water shortage in northwest China.