Abstract: Three rainstorms in Zigong in July were analyzed by using ground meteorological observation, radar and Fengyun-2 satellite data. The results show that the high-altitude low-value system, ground cold air and subtropical high blocking make the hourly rainfall of three heavy rains large and the range large. About 7.15 rainstorm, the location of the observed vortex is souther than that predicted by the model, and the subtropical high retreats eastward slowly. About 7.2 rainstorm, the ground convergence line is easterly, and the forecast rainfall area has a slight error with the actual situation. The numerical model prediction has a good show of the rain belt, but weak and northward of the rainfall intensity. The precipitation intensity and falling area predicted by NCEP, SWC numerical models and Sichuan Meteorological Observatory are closer to the actual situation.