Abstract:The minute’s rainfall data and radar echoes in three heavy rain processes, which are chosen from Meiyu front, squall line and tropical system respectively in recent years, were used to analyze features of minute class rainfall distribution. The statistical features of three heavy rainfall processes were discussed through the precipitation rate, duration of precipitation and precipitation change’s rate. Finally, the average state of first one hour precipitation in strong precipitation periods was given. The results showed that minute’s precipitation series could be a very good performance of precipitation features in meso γ scale convective system. If combined with the radar echo and wavelet analysis, it could make up for the low time resolution of hour precipitation series. Analysis of samples in three heavy rain processes found that in the squall line, one single station only had once strong precipitation period, and the accumulative rainfall was less than 50 mm almost. It had high precipitation rate, but short duration periods and high variability, therefore, the prediction was difficult. However, under the influence of tropical convective systems, the single station precipitation was composed of many strong precipitation periods, and its accumulated rainfall up to 100 mm. Its precipitation rate was small, but had the longest duration time, and precipitation was more even. For the third heavy rain process, strong precipitation period in Meiyu front system corresponded to duration of 1-2 h, higher rate of precipitation than tropical convective systems, and the accumulative rainfall less than 100 mm. The precipitation nature was between squall line and tropical system, thus the prediction was the most complicated.