Abstract: Using hourly rainfall data at 164 weather stations over Hubei, Hunan and Jiangxi provinces located in the middle reaches of Changjiang River, the statistical analyses of meso-scale system for seven large scale and persistant torrential rain events in 1980s’ are made. The rain-peak analysis method is available for use, and 165 meso-scale systems are captured. The original regions, movement tracks, and speeds, life cycle and the daily variation of the systems are analysed. Furthermore, the probability characteristics of rainfall intensity per hour for the systems are fitted and discussed by Γ-distribution function.