In the past 20 years，the process of urbanization in China has been unprecedentedly swift and violent. With the influence of global warming，the characteristics of flood disaster risk and the demand for security have been changed remarkably. Due to rapid expansion of the city area，the lag of flood control and drainage infrastructure construction，“city to see the sea” into a few normal；a large number of young rural villages，perennial dike maintenance and flood rescue forces weakened，medium and small rivers and lakes flood levee breach has occurred；the rural land circulation after intensive management of a large family，once the disaster，not only is the victims，and may become the huge public debt，the existing civil relief and social relief system to help restore production and rebuild their homes. Based on the analysis of the data of this report，combined with the research of typical cases，discusses the evolution characteristics of flood risk in China，from the stage of development，grasp the demand for harmony between human and nature，strengthen flood risk management and emergency response basic research and capacity building aspects of the direction of adjustment of integrated water management strategy.