With the development of urbanization , more and more small and medium-sized cities appeared, but the general county-level cities did not fully consider the requirements of flood control in urban planning and construction, so there is a big risk of flood disaster in these cities. By investigating the present situation of urban flood control in Jiangxi province, this paper studies the evaluation index system, which is suitable for our province's key flood control cities, and puts forward the key flood control city directory. Those will provide technical support to confirm the overall requirements and major tasks of the flood control work and reduce the loss of urban flood disaster.