Based on the ERA40 reanalysis data,this paper explores the basic features of the multi-spatial-modes reflecting anomalous East Asian summer monsoon(EASM) activity and their relevant atmospheric general circulation anomalies by using statistical methods,such as the correlation,composite and EOF analysis.Results suggest that:1)There are three typical spatial modes of EASM with significant differences among them.The first mode represents an out-of-phase variation of summer wind between the coastal area in eastern China as well as its adjacent ocean and the region to the west of the coastal area,which reflects the westward/eastward movement of EASM.And the second mode shows consistent variation of summer wind over the extensive areas,originating from South China,across the mid-lower reaches of the Yangtze River,Shangdong Peninsula,the Bay of Bohai Sea,to northeast China and the Korean Peninsula,which represents the overall variation of EASM intensity.However,the third mode suggests an out-of-phase variation of summer wind between south China and the coastal area in East China,the Korean Peninsula,and northeast Asia,reflecting the northward/southward movement of EASM.2)The atmospheric general circulation anomalies related to the three spatial modes of EASM exhibit significant differences.The first mode bears negative correlations with SLP over South Asia and the Sea of Okhotsk,and positive correlations with SLP near the Arctic,Lake Baikal and the ocean east to Japan.The correlation between the first mode and summer 500 hPa geopotential height is featured by a "+-+" wave-train-like pattern from the polar region,across the Sea of Okhotsk,to the ocean east to Japan.The second mode shows very similar correlation patterns with both SLP and 500 hPa geopotential height,which represent an out-of-phase variation of SLP and 500 hPa geopotential height between northeast China,the Korean Peninsula,the Sea of Japan and the Philippines as well as the Sea of Okhotsk,forming a "+-+" wave-train from the low latitudes to the high latitudes.The correlation patterns of the third mode with SLP and 500 hPa geopotential height are both alternated with positive and negative over the ocean around the Philippine,Japan as well as the ocean east to Japan,the Lake of Baikal,and northern Asia.