Extreme high temperature events are becoming serious under climate change and this trend will continue.Based on the high spatio-temporal resolution dataset of NASA Earth Exchange (NEX) Global Daily Downscaled Projections (GDDP) and historical observation data,the spatio-temporal distribution characteristics of extreme high temperature events at present and potential climate change were studied.The results shown that,the average daily maximum temperature at each time period and emission scenarios was smaller in the eastern coastal area,and gradually increased to the western part of Shandong.Daily maximum temperature increased with time.This trend was more obvious under Representative Concentration Pathway (RCP) 8.5,and the temperature increased range was larger in western part than eastern part.The extreme high temperature days also had an increasing trend with time,especially under RCP8.5 during 2070-2099.Over half of Shandong the number of extreme high temperature days over 80.The NEX-GDDP dataset has a good performance.The extreme high temperature disaster will worsen,and summer corn will face a major threaten.