The reanalysis data from NCEP / NCAR and other observational data. Have examined the variation interannual Mascarene high (MH) and high (AH) Australia from 1970 to 1999. It shows that the variation interannual of MH domained by oscillation (AAO) Antarctic when deepens lowest circumpolar in south latitudes and high intensity. MH will be intensified in the southern oscillation (ENSO), the intensity of the AH would have intensified Suntory ENSO occurs. Correlation analysis and case studies show that. Tropical Rainfall over East Asia is closely associated with MH and MH AH when more intensifies the boreal spring to summer. Rainfall over the region of the Yangtze River valley contrast to Japan, found little rainfall over southern China and the western Pacific to the east of Taiwan. And most of the region in the mid-latitudes of East Asia. Compared with the results of AH MH hot rain in East Asia, a region of local constraints. Also increased rainfall over southern China on the strength of AH results of this study show a strong signal that the AAO on interannual time, which plays an important role in the summer rainfall over East Asia. These findings have practical significance to reveal the physical mechanism of the interannual variability of the East Asian summer monsoon and prediction of summer rainfall in China.