Abstract:Water construction in grassroots level is important to the rural infrastructure construction, which is of great significance for preventing and controlling flood disasters, ensuring agricultural production and maintaining the rural ecological environment. Starting from the economic and social impacts of flood disasters on rural areas, this paper deeply analyzes the role of the infrastructure functions, water resources regulation effect and ecological balance promotion mechanism of grassroots water construction in alleviating flood disasters. Furthermore, it puts forward countermeasures and suggestions such as improving policy support, optimizing technical means, strengthening the combination management mechanisms and ecological protection, with expectation to provide a reference for improving the efficiency of grassroots water construction and preventing and controlling rural flood disasters.