Abstract: Urban waterlogging threatens people’s life and property safety seriously. A scientific assessment of urban waterlogging risk and corresponding measures are effective ways to reduce waterlogging losses. In this paper, taking a certain area of Changzhou City as a research case, MIKE FLOOD model is used to carry out drainage capacity analysis of rainwater pipes and urban flood simulation, and quantitatively analyze the drainage capacity of rainwater system facilities through waterlogging scenario simulation. Combining scenario simulation method with index evaluation method, the index system of waterlogging risk assessment based on “Risk, vulnerability and exposure” is used to assess urban waterlogging risks. The waterlogging risk assessment system is mainly divided into the target layer, the criterion layer and the index layer. The main indicators include the depth of standing water, the length of standing water, the drainage capacity of the pipe network, the ground elevation of the site, the regional importance and the intensity of development and construction. According to the evaluation results, this paper focuses on the implementation of risk management for key issues in the flood control system. It is suggested that the systematic problems should be solved by optimizing the drainage scheme. Flexible adjustment shall be carried out for waterfront waterlogging prone depressions to avoid risks. Aiming at the problem of urban construction mode, the mode of combining green and gray facilities is implemented.This paper puts forward management measures such as adjustment of drainage scheme, risk avoidance and risk response, so as to provide scientific support for improving the urban waterlogging risk system. The results show that:（1） Multi-factor analysis is used to evaluate the impact of waterlogging disaster, which makes the evaluation results more comprehensive and can provide a reliable basis for waterlogging management.（2） The adjustment of waterlogging prevention in the southern part of the city from “completely self-draining” to “low water level based on self-draining, high water level flexible pumping” can reduce the water level of inland rivers, reduce the jacking effect on pipelines, and effectively reduce the risk of water logging in the area.（3） The riverside depression risk area should give priority to the layout of hydrophilic land or facilities. For other types of land that really need to be built, the vertical elevation should not be less than 3.9 m.（4）In the process of urban development and construction, we need to pay more attention to the risk response of the combination of green and gray facilities. Headwaters sponge facilities need to be built to cut stormwater runoff. Public sponge facilities need to be built to play a role in storage and reduce the risk of waterlogging.