The paper analyzed the spatiotemporal characteristics of storm of the Taihu Basin by use of the rainfall data from 1951 to 2010 of Taihu basin from two aspects of average rainfall days and the maximum precipitation of 30 days.The results indicated that the temporal distribution of average rainfall days and the maximum precipitation of 30 days possesses the upward trend but is not obvious,and the spatial distribution of storm in hilly areas is more than that of plain areas.The paper propsed two spatial combination schemes of design storm by statistical analysis for the return period of period rainfall of the basin and partitions could reflect the feature of design storm of calculation method of temporal and spatial distribution.The results indicated that the spatial combination scheme of design storm and related calculation method adopted in this paper aimed at the feature of storm in Taihu basin are reasonable.