Research is carried out of six rainstorm events during 1980～1983 Meiyu periods, occurring in Anhui based on the 117.5°E section, Evidence suggests that the Meiyu front is usuallyaway from ground without pronounced frontal features at low levels, and that a“precipitation-caused front”is often observed On the s outhsidewhen abeldikethunderstorm rainfall occurs inthe near-surface layer,Apreliminary study is undertaken of the genesis and evolution of the precipitation-caused front alongside detailed analysis of meridional circulation features at variousphases.