Based on daily precipitation data of 53meteorological stations over the North China Plain during 1961-2010

the extreme precipitation thresholds were determined for different stations by centesimal value method.Then

the three indices of annual amount

frequency and intensity of extreme precipitation events were counted and their spatial characteristics and temporary trends were analyzed.Results showed that most stations in the North China Plain had no significant monotonic trend by each selected index of extreme precipitation events and however

the annual amount

frequency and intensity tended to reduce.Furthermore

the variation trends of extreme precipitation events exhibited similar spatial variability.Specifically

there was a positive trend of extreme precipitation events in Hebei Province and the southeast coast of Shandong Province

while a negative trend

in He'nan Province.Each index fluctuated during 1961-2010

and basically showed a significantly decreasing trend in the 1960s.The annual amount and frequency showed abrupt changes around the year of 1965.However

the intensity did not show an abrupt change.