Abstract: Based on the blackbody brightness temperature (TBB) data of FE-2E geostationary meteorological satellite from 2010 to 2019, the precipitation observation data of 24 automatic weather stations in the south of Panxi area, and the reanalysis data of ERA5 from ECMWF, it analyzes the characteristics and environmental conditions of the MCC affecting the southern part of Panxi Region, and the results show that the MCC affecting the southern part of Panxi Region appears from June to September, with the highest frequency in June. It has the characteristics of rapid generation and disappearance, short life history and small spatial scale. MCC affecting southern Panxi Region is mainly born in the southern part of the Western Sichuan Plateau and the northwestern part of Panxi Region, and dies out in the southern part of the Panxi Region and the northern part of Yunnan Province. Its moving paths are mainly from northwest to southeast, born in the afternoon and formed in the evening to the first half of the night, and dies out in the early morning to the morning of the next day. MCC develops and forms in an environment of high temperature, humidity and energy. MCC requires a low TBB value to produce strong precipitation. The high-level South Asian High ridgeline and the shear convergence of the middle and low levels are its main influence system. The vertical structure of the system is characterized by low-level convergence, high-level divergence and significant ascending movement. According to the maximum 24-hour rainfall in the southern of Panxi area, MCC affecting the southern part of Panxi Region can be divided into heavy rain type, rainstorm type, heavy rain type and small rain type. The impact situation of heavy rain type, rainstorm type and heavy rain type is similar. The high-rise is located near the east ridge line of South Asia High, and the middle layer is located in the tail area of low trough, and the lower layer has shear convergence. The South Asia High of heavy rain type is stronger than that of rainstorm type and heavy rain type, and the low value system in middle layer is more obvious than that of rainstorm type and heavy rain type, while the small rain type is located in the upper northeast air flow on the south of the ridge line of the eastern of South Asia High, and the low value system of the middle and low layers is north.