Using the REOF and wavelet analysis methods,the summer precipitation from 39 stations in Eastern China for the periods 1900—1999 is analyzed.The results show that South China and Southwest China,the middle and lower reaches of the Yangtze River,North China and the Southwest of Northeast China are three areas,where remarkably interannual and interdecadal variability of summer precipitation exists,separately.The relationship between them with winter SSTA over North Pacific is examined.