In order to reveal summer (from June to August) precipitation characteristics of the Taihu Basin under the influence of El Nino events during 1951-2016, the precipitation differences of the starting and ending years were analyzed. The results show that the El Nino events have some impacts on summer precipitation. (1) For El Nino events with low intensity, the probability of severe and extremely drought is higher in June and June to August of the starting years, as well as June and July of the ending years. For El Nino events with medium intensity, the probability of severe flood is higher in June and June to August of the starting years, while the probability of partial and severe drought is high for the same period of the ending years. For El Nino events with high intensity, the probability of severe drought in June and severe flood in August of the starting years is higher, while the results of that in ending years were inverse. (2) The subtropical high over the western Pacific is smaller, weaker and shifted eastward in summer of the starting years in El Nino events with high intensity, whereas the subtropical high enhanced and stretched westward in summer of the ending years, leading to plentiful precipitation of Taihu Basin. (3) The total number of formatting typhoon and landing typhoon is slightly less in the starting years of El Nino events with high intensity, however, the number of formatting typhoon in summer and landing typhoon in autumn is large. Plenty precipitation in June as well as typhoon concentrated in autumn tends to cause continuous floods over the Taihu Basin.