Urban waterlogging control is an important task in China for a long time.Solving the problem of waterlogging at important nodes such as underpasses is a key way to reduce the harm of urban waterlogging. This article discusses the waterlogging prevention and control system, including both engineering and non-engineering measures, and analyzes the causes of underpass waterlogging in detail. The use of coupling models can effectively assess the risk of underpass waterlogging, identify the causesand determine the severity, and finally propose quantitative measures to effectively improve the level of waterlogging prevention and controlof underpass roads.