The concept and connotation of urban flood disaster risk are analyzed systematically, and it is discussed that the application situation, scope of application as well as the advantages and disadvantages of four flood disaster risk analysis methods including historical disaster statistics, remote sensing and GIS coupling, index system method and scenario simulation method. The index system method which is widely used for risk assessment is mainly discussed and the method of index system construction and index weight determination are introduced. The equal interval method, quantile method, mean standard deviation method, natural interruption method and membership function method that can be applied in the urban flood disaster risk level zoning are expounded, providing reference for the flood risk level zoning.