Abstract: Based on conventional meteorological data, regional automatic station rainfall data and NCEP 1°×1°reanalysis data from 2010 to 2016, According to the different ridge position of the subtropical high pressure during the rainstorm, 5 circulation types and their corresponding rainfall drop areas are summarized. The results show that: heavy rainfall mainly occurred in May-July, highest occurrence in June, the most frequent occurrence of the south china coastal type and the least subtropical high voltage control type, the south china coastal type, the north-central type, the subtropical high voltage control type are "two channels, one Ridge", the south-central type and the Guangdong and guangxi border east type are " multi-wave" circulation, there is no trough activity between the north-central type and subtropical high voltage control type, the rest has short wave trough activity. At the lower level, all types are present in guizhou province with an obvious θsefrontal zone, its south side has southwest monsoon air to convey water vapor and energy to guangxi. The south china coastal type and the Guangdong and guangxi border east type also have a subtropical southeast monsoon stream. The subtropical high voltage control type that's monsoon winds and frontal areas are weak. There are convergence lines in all types of near ground, and their position is consistent with that of rainfall. In the south China coastal type, the rainstorm position is more northerly and more intense, and the probability of rainstorm is higher. Both the south-central type and the two broad boundary type are both the vice versa and the intensity is greater. The central and northern type and the secondary high control type of rainstorm zone are highly dispersed.