With REOF,9 point binomial filter,accumulative anomaly and composite analysis methods,the inter decadal variation,abnormal spatial features,and temporal evolution regularities of extreme high temperature in summer in Shandong Province and its relation with the East Pacific SSTA were studied in detail.Some results are obtained:from 1950s to 1990s,extreme high temperature in summer dropped in most parts of Shandong with the lowest in 1980s,then an increase in the 1990s, a transition from high to low from the end of 1960s to the early 1970s; anomaly occurs frequently in the northwest and southwest parts,Linyi and the peninsula of Shandong Province relatively.There is apparent negative correlation between Shandong and East Pacific SST extreme high temperatures.