The NCEP/NCAR reanalysis data have been used to check the principal modes of the South Pacific sea surface temperature(SST) anomalies through empirical orthogonal function(EOF) in DJF.The EOF1 mode of SST anomalies in the South Pacific is related to ENSO(El Ni?o-Southern Oscillation) and bears periodicities of 3-5 years.The EOF2 mode is related to Southern-Hemisphere Annual Mode(SAM) and bears the periodicities of quasi-biennial.The relationship between precipitation anomalies in China and the EOF modes of SST anomalies in the South Pacific is analyzed.When time coefficient of South Pacific EOF1 is in positive(negative) phase, the rainfall in May is more(less) than normal in North China.This scenario seems to be similar to that between rainfall and EOF1 mode of SST anomalies in the North Pacific.When the time coefficient of South Pacific EOF2 is in the positive(negative) phase, the rainfall of South China reduces(enhances) in summer.These results almost keep unchanged when the linear trend is removed separately from the SST anomalies and rainfall data.Using the time series of EOF1s of the South and North Pacific as two predictors, the rainfall in North China in May could probably be predicted.