Abstract:Large-scale irrigation districts are key to ensure China's food security. The modernization reconstruction of large-scale irrigation districts plays a significant role in safeguarding national food security and promoting the development of modern agriculture. This paper systematically analyzes the basic conditions and existing problems of Weishan Irrigation District, a large Yellow River diversion irrigation district. It puts forward ideas and measures for the overall implementation of supporting and reconstruction of irrigation and drainage projects, digital construction, water ecological protection and restoration, and innovation of management systems and mechanisms, so as to build a modern irrigation district with "complete facilities, water-saving and high-efficiency, scientific management and sound ecology", providing references for the modernization reconstruction of other irrigation districts.