Abstract: Using data for the past 34 years, a correlative analysis has been made for the relationship between each characteristic index of West Pacific Sub-tropical High in the months of June (WPHJ) and the Southern Oscillation indexes (SOI) during the preceding months. It was found that all montlhy SOIs from the past summer throngh March have substantial influence on the strength and locations (both meridional and zonal directions) of WPHJ. but the correlations between the preceding winter-spring SOI and the frequency of WPHJ stretching northwestly varied greatly with years.Through analyzing.it is found that the latter is influenced by the composite effect of SST anomalies both with planetary and regional scales, and the preceding winter SOI is only one factor of them.On the other hand.it reflects the fact that the winter-spring SST anomaly patterns of temperate-tropical Pacific are also changed with years.