China is a large agricultural country. Agriculture plays a very important role in the national economy. It is the foundation of the national economy, and grain is the foundation of the foundation. With the continuous increase of Chinas total economic output and population, the carrying capacity of water and soil resources has been close to the upper limit. The per capita arable land in China is less than 1/3 of the world average level, and the per capita water resources is less than 1/4 of the world average level. The serious shortage of water and soil resources has become the primary constraint to the development of national economy, especially the sustainable development of agriculture. Therefore, developing water-saving agriculture, improving the effective utilization rate of agricultural water and increasing crop yield per unit area are the important basis for sustainable agricultural development. With the rapid development of population growth and social economy, agricultural water consumption is increasing, while the growth of water supply is obviously lagging behind the growth of water demand. According to the statistics of current water use, the country is short of 36 billion cubic meters of water in moderate drought years. Over the past 10 years, the drought-stricken area in China has been 2 to 27 million hectares (1 hectare = 15 mu) every year, and about 7 million hectares of irrigated area have not been irrigated due to water shortage. More than 60-70 billion kilograms of grain are produced every year due to water shortage. Due to water shortage and over-exploitation of water resources, some rivers in the Huang-Huai-Hai River Basin, the Liaohe River Basin, the rivers in the Jiaodong Peninsula and the inland river basins of Xinjiang, Qinghai, Gansu, Ningxia and Inner Mongolia have dried up, rivers have dried up, rivers have shrunk, lakes have dried up, and some groundwater levels have dropped, resulting in groundwater funnels, land subsidence and seawater intrusion; Some land desertification has posed a serious threat to the survival and development of our country, which directly threatens the development of our agriculture. Water-saving agriculture focuses on improving the effective utilization rate of water, and the standard to measure water-saving agriculture is the utilization rate and productivity of water. According to statistics, if the utilization rate of agricultural irrigation water in China is increased from the current 0.45 to 0.7 in developed countries, 90 to 95 billion cubic meters of water can be saved annually. It can not only solve the problem of about 700 million tons of water for food production, but also provide 40-50 billion cubic meters of water for other areas of the national economy. The development of water-saving agriculture is of great significance to the development of agriculture, economy and society in China, and has broad prospects. Photovoltaic Water-saving Irrigation Technology Helps Modern Agriculture Development Photovoltaic water-saving irrigation technology is a green ecological industrial technology of agriculture and animal husbandry, which combines photovoltaic pumping and water-saving irrigation technology. It has been applied in agricultural and forestry irrigation, desert control, grassland animal husbandry and other fields in more than 110 countries and regions around the world, which is very suitable for water demand in areas without electricity and water shortage. In the northwest, southwest and other remote areas of China, due to the incomplete coverage of the power grid and less precipitation, the shortage of irrigation water seriously restricts the production of agriculture and animal husbandry. It is urgent to vigorously promote photovoltaic water-saving irrigation technology to fundamentally solve the problem of agricultural water shortage.