Using the daily rainfall data of 90 stations in East China from 1960 to 2009,the interdecadal changes of occurrence frequency and intensity of precipitation extremes in boreal summer(June-July-August) in East China in recent five decades are investigated.Results show that there are significant interdecadal changes of the precipitation extremes in the past 50 years.In recent 20 years,the precipitation extremes occur more frequently than those in the earlier 30 years,and more and stronger extreme precipitation events are observed in 1990s.In East China,the extreme events of precipitation processes last usually less than 9 days.However,the extreme events of continuous rainy days last usually more than 9 days.Relative to the other regions in East China,the more precipitation processes with higher persistence and stronger intensity occur in Fujian Province.The largest extreme rainfall appear in conjunction part of Jiangxi and Anhui provinces.Zones where the extreme events of precipitation occur more frequently moves interdecadally in meridional direction.The north-south shifts of the zones mentioned above are also observed in the extreme events of daily precipitation and precipitation processes.Interestingly,there exist two frequent occurrence zones of precipitation extreme events over the south and north of Yangtze River,respectively.The two zones get closer to each other and even merge into one in some decades,and get distant from each other in other decades,which is observed in the last three decades.