Based on the U.K.global SST,NCEP/NCAR reanalysis data and 160 stations rainfall data in China,by using the composite and singular value decomposition(SVD) methods,the effect of the Indian Ocean Dipole(IOD) on East Asian atmospheric circulation and precipitation in 1951-2000 has been studied in the present article.Results show that the IOD anomaly results in anomalous atmospheric circulation,which affects the distribution of the rain belt during rainy seasons in China and the East Asian monsoon.When the IOD is positive(negative),the subtropical high is south(north),and west(east) of its mean position,and stronger(weaker) than normal;the East Asian monsoon is stronger(weaker);the summer rainfall is less(more) in the Yangtze River basin and more(less) in south China.