Based on multi-resource data, the multi-scale characteristics are analyzed for the extreme rainfall in Zhuzhou , Hunan Province during 14-15 June, 2016. The results showed that the heavy rainfall is located in the warm zone on the south side of the cold front of the ground. Cold air southward and wet airflow in front of the south branch groove meets in Hunan is the background of the high-altitude circulation causing the heavy rainfall. A stably maintained ground convergence line provides a trigger mechanism for heavy rain. The extreme rainfall process broke the extreme values of daily rainfall and hourly rainfall since Zhuzhou station was built, which includes two stages of convection and stratification stability. The strong rainfall occurred in the process of increasing the positive vorticity from the upper layer to the lower layer, the strongest upward airflow and the stronger southwest current. The divergence in the upper layer is stronger than the convergence in the lower layer, so the divergence suction effect is strong. Mesoscale clouds showed that Zhuzhou torrential rain is mainly formed by the development and fusion of three meso-γ scale clouds, which appear in the stage from occurrence and development of meso-scale clouds to mature, and its falling area is located in the TBB gradient large area on the western edge of the clouds. The radar precipitation echo is mainly low centroid echo, and the strong precipitation echo causes obvious " train effect" in the development of Zhuzhou central region. The velocity radial profile shows obvious bottom upwind region, and there is strong oblique upward airflow in the front, which makes convective storm maintain and develop.