Asia is a distinct monsoon region in the world. In China the characteristics ofrainfall distribution are not only closely related to the background of the East Asian planetary scale circulation, but also to the structure of large topography in this area. By using a primitive equation model in p-σ coordinates,this study focuses on the West Pacific subtropical high,the intensity of the continental warm low system and their combination, i. e., the characteristics of zonal stationary waves corresponding to the EastAsian summer monsoons of different intensities and the East Asian sealand thermalstate in order to reveal the relationship between the summer monsoon flow pattern andthe rainfall distribution in East China. Studies are made of the correlation between the confluent features of the East Asian monsoon flow and the sea-land zonal stationary wave patterns, and the relationof the pattern of warm wet regions in summer and the formation of the warm wettongues to the rainfall in East China. In addition. the dynamical structure of the upper-and lower-level flow fields and the features of the South Asian high during the formation of rain belt in East China.