Abstract: In the context of global climate change and rapid urbanization, floods frequently occur in urban areas around China.Flood numerical simulation technology has become a research hotspot in the field of urban water conservancy and disaster prevention and mitigation. This paper reviews the development history of urban hydrological process calculation methods from three aspects:surface runoff generation, surface slope convergence, and river network/pipe network convergence. Following the review, the development trend of urban flood model is explained from the perspectives of scientific research and engineering-level application. Subsequently, the development trend of urban flood model construction technology is summarized from five aspects:flood simulation of urban, overpass accumulated water simulation, flood simulation of underground space, impact of modeling scale on flood simulation and flood simulation under complex data conditions. Finally, the future development trend of urban flood simulation technology is discussed in terms of physical mechanism simulation of the whole flood process, refined simulation, high-performance computing, multi-scale nested simulation for multi-objectives, service to the public, and model +.