The single point correlated map for summer rainfall in east China which has the maximum number of stations who′s correlation coeffecient is greater than the statistical threshold is defined in this paper as the main correlation pattern, and its corresponding circulation features are investigated. Results show that summer rainfalls in the Hetao area and the mid-lower valleys of the Yangtze river are well representitive of the rainfalls in east China, and rainfalls in the two areas are oppositely correlated. Therefore, the rainfall difference between the two regions is used to delineate the dominant pattern of summer rainfall in east China. When the rainbelt locates in the Hetao area and the mid lower reaches of the Yangtze river suffer from the shortage of rainfall, the easterly anomaly circulation prevails over the mid lower parts of the Yangtze river, accompanied with a stronger Walker circulation in the Pacific, a more vigorous summer monsoon in south Asia, and a northward shift of the South Asia High. Besides, it is also found that the circulation anomaly over east Asia is vertically equivalent barotropic.