Based on the daily precipitation data in flood season(from May to September) in 1961-2010 from 35 stations over Three Gorges Reservoir area, the extreme precipitation threshold value for all stations are determined firstly, then the frequency of extreme precipitation event in the flood season are counted and their temporal and spatial characteristics are analyzed. Consistent anomaly distribution is the main spatial model of extreme precipitation event frequency in flood season over Three Gorges Reservoir area. The spatial distribution of extreme precipitation event frequency is complex with anomaly difference between in the south and west, and in the east and west of Three Gorges Reservoir area, which can be divided into five main regions. The moving t-test analysis shows that there are abrupt changes of Banan in 1974, Beibei in 1981 and 1993, and Wulong in 1984 for the extreme precipitation event frequency. The Maximum Entropy Spectral and Estimation Power Spectral analysis shows that the periodic oscillations of these regions are not consistent in recent 50 a. The distinct periodic oscillation of the extreme precipitation event frequency of Yichang, Beibei and Wulong is 5, 2.4 and 8.3 a, respectively.