Based on the NCEP/NCAR reanalysis,British Meteorological Office global sea surface temperature(SST) and China 160 stations temperature data during 1951—2000,the empirical orthogonal function(EOF),composite analysis,correlation and singular value decomposition(SVD) methods are used to study the effect of the Indian Ocean Dipole(IOD) on South of China rainfall(in China south of 33°N).Results show that the SST anomaly in Indian Ocean aroses the atmospheric circulation anomaly,which induces the rainfall anomaly in South China.When Indian Ocean SST is higher(lower),South China rainfall is more(less) than the normal.When IOD is positive(negative),the precipitation is more(less) in South China and less(more) in the Yangtze River Basin.