Based on the daily extreme temperature data from 1960 to 2009,which from the Information Center of China Meteorological Administration,and the NCEP/NCAR reanalysis data.Analysis of the time and spatial variation of Mean extreme maximum temperature(EMT) days and Mean maximum temperature(MMT) in 85 stations,and the atmospheric circulation in EMT days.The results shows that:Annual extreme maximum temperature(EMT) days and mean maximum temperature(MMT) during the EMT days are increasing with developing of the t...