Based on the data of SST,rainfall in China,OLR and NCEP/NCAR 1958-1997 reanalysis data,the spatial/temporal variations of SSTA in the Kuroshio current region and its relation to summer precipitation in China have been analyzed by using the REOF method in this paper.Results show that there is an striking interdecadal change in SSTA,and the 4th-REOF spatial mode is a typical pattern for SSTA in the Kuroshio region.Correlation and composite analysis both show that there is more(less)rainfall in the Yangtze River in the positive(negative)anomaly year,especially in the Dongting Lake Region.