Abstract: By using the 20: 00 ~ 20: 00 24 hrs ground actual precipitation data of national station and regional station in Chengdu area during 2006 ~ 2015, the conventional observation data and the NCEP1°×1° reanalysis data, statistical analysis was performed for the regional rainstorm in Chengdu. The results showed 43 cases of regional rainstorm occurred in Chengdu area during this period, and most times in 2013. The regional rainstorm occurred mostly in July (49% of the total times) . Based on the different influencing system of the regional rainstorms, they could be simply divided into three types, which were low vortex type, upper trough and shear line type and subtropical high edge type. The occurring times and durations of the three types were different, the proportion of the occurring times were 40%, 46% and 14%, and the durations were mostly one day. Characteristics of large-scale circulation background of different types of regional rainstorm were analyzed for three history cases.