According to the climate characters in Shanxi province,the whole province was divided into four storm partitions.The paper used design storm to calculate the design flood in the region without flood data,and utilized the rain storm type in design flood hydrograph.It described the method of analysis for the daily and hourly design storm,and used these methods to analyze each rainstorm district,obtained the rainfall pattern.Aimd at small basin and short confluence time of lasting less than 1h,It constructed o...