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统计了皖东南地区１９６０～１９８９年暴雨频数，考察暴雨序列样本之间相似系数，得出多波振动的暴雨频数年际变化模式和半波振动的月际变化模式。年暴雨频数的大小与水旱年基本对应，并存在准３年周期振荡；半波振动的峰区对应梅雨期。月暴雨频数的地理分布又与重要天气系统活动关系密切。
The frequency of heavy rain in 1960 ~ 1989 in southeastern Anhui Province was calculated. The similarity coefficient of heavy rain sequence samples was investigated. The interannual variation pattern of multi-wave vibration and the monthly variation pattern of half-wave vibration were obtained. The annual rainfall frequency basically corresponds to the year of flood and drought, and there is quasi-3-year periodic oscillation; the peak of half-wave vibration corresponds to the Meiyu period. The geographical distribution of monthly heavy rain frequency is closely related to important weather system activities.