Abstract: By using the data from the CINRnD,satellite,automatic meteorological stations, wind profiler radars, the PWV/GPS, the GFS/NCnR reanalysis and the conventional observation,an extraordinary rainstorm event,occurred in the east of the Wuling Mountains on the Huhei-Hunan border(near Tongcheng) on 10 June 2011,was analyzed focusing on the development of mesoscale disturbance systems along the Meiyu front and the associated structure characteristics of the mesoscale convective system. The results showed that:Firstly,the excessive rainstorm was related to the combined effects of mesoscale convective systems formed via the growth of two mesoscale cyclonic wave perturbations,and the back-propagation of mesoscale connective systems in the warm low upend trough ahead of the cold front played a significant role in the rainfall formation and enhancement. Secondly,the area in the east of the Wuling Mountains on the Hubei-Hunan border was one of the important seedbeds,where mesoscale convective cyclonic wave generate or strengthen. The favorable factors of thermodynamics and kinetics induced by the complicated terrain around the middle reach of the Yangtze River played important roles. Finally,the development of mesoscale connective systems was closely related to mesoscale cyclonic disturbances. Thunderstorm cell centralized and developed intensely near the cold/warm front and the center of the vortex. And organized by the strong cyclonic wave system,the precipitation echo manifested some features with the cold and warm front structure as a whole,such as the comma-shaped,vortex-shaped,“S”-and herringbone-shaped,and so on.