With the realtime data measured minutely by the lightning monitoring and warning network, the precipitation data measured minutely from automated precipitation stations, as well as satellite cloud pictures, the cloudtoground lightning (CG) characteristics of a local rainstorm in Hubei on 29 April 2013 are analyzed. The results show that CGs appeared at 500 hPa between the shear line of 700 hPa and 850 hPa, with TBB≤220 K, and negative CGs were dominant during the rainstorm; the strong precipitation occurred in rhe negative CG concentrated area. CGs had different phase with MCS. There is a good temporal and spatial relationship between CG, TBB and strong precipitation. Further analysis shows that when TBB decreased to the lowest value, CG flashes rate reaches the peak, and the trend of negative lightning frequency and strong precipitation are consistent. Precipitation appeared 1 to 18 minutes after the first negative CG, and the sudden increase of negative CG is 18 to 24 minutes in advance of heavy precipitation. This case shows that the MCS would move toward the front of the negative lightning path.