Abstract: In recent years, the problem of urban waterlogging has threatened more and more cities. The paper adopts a coupled rain and flood model to simulate the flooding state of Zhaoyang New City in Nanchang City when it encounters 1, 3, 5, 10 and 20 a rains during the return period. The complete process of the formation and recovery of urban waterlogging under different return periods of rainfall is studied, combined with the elastic analysis method, and also studies the flood resistance and recovery ability of the Zhaoyang New Town area of Nanchang City. At the same time, it analies the land use situation of the study area in three different years, and explores the impact of the development of urbanization on the defense and recovery ability of the study area after being attacked by rainfall. The results show that the development of urbanization and the increase of the return period of rainfall will lead to the reduction of the research area's ability to resist and recover from floods. The research results will help to formulate scientific and reasonable anti-disaster strategies faster and accurately in the future flood prevention and drainage work, in the meantime,it enables humanity to understand more intuitively the impact of the urbanization process on regional defense and resilience.