Abstract: An analysis for the local rainstorm which occurred at the Malong county on 25-26 June 2010 has been made with the data from thunderbolt position,Doppler radar and FY-2E satellite.The result shows that the obvious convergence of dry-cold air of upper level and the moist-airflow of low level in the east of the centre of Yunnan is the main influential system.The features in Doppler radar are the merging and enhancement of two echo ribbon,and the obvious "train domino effect" overhead of Malong formed by that many small individually echo moving eastward quickly and incorporating into the same spot.The emergence of meso-scale low-level jet and Converse wind region enhances the movement of lifting and convergence and release Convection unstable energy at the upper level of Malong,leading to the Severe rainstorm over Malong.The features in satellite are the large cold-cloud center area that TBB less than -60℃ and the maintaining of this feature long time at the up per level of Malong during MCS merge to meso-β-scale Convective clouds,then develop to Convective cloud band and Produce heavy rainfall.Frequent C-G lightning activities always appear during heavy rainfall,The CG flashes clustered in the area of intense echo where small individually echo merge,which corresponded to the Convergent region (Radial velocity≤10 m/s),the back of Converse wind region and the region of Echo top height≥15 km, the peak time of TBB and CG flashes is 1-2 hours ahead of heavy rainfall.