Abstract: The precipitation data and 500hPa geopotential height data used in this paper are from NCEP/NCAR data set for the period from 1950 to 1999(from April to September). By using the SVD (Singular Value Decomposition), the seasonal coupling relationship between the transitions of East Asian summer monsoon (EASM) rainband and the west Pacific subtropical High (WPSH) was investigated. We see from the results of the SVD analysis that, the contribution of the modes explaining less squared covariance percentage must be considered for some regions and some periods. Results indicate that the different modes reflect the three abrupt changes separately, and the three abrupt changes of WPSH correspond to the sudden jumps of EASM rainband over the different regions. The multiple monsoon rainfall onsets occur as the major rainbands make rapid transitions to these regions.