Based on British Bureau global SST,NCEP reanalysis data and 160 stations rainfall data in China, the analysis of composition and SVD is presented.Results show that when the SSTA is the consistent positive (negative) during spring in South China Sea, Bay of Bengal and Arabian Sea,the subtropical high is southern(northern),western(eastern) of its mean position and stronger(weaker),the rainfall is more(less) in the Yangtze River basin and less(more) in south and north of China in summer.