Based on daily temperature (maximum,minimum and average)data of 153 meteorological stations,the spatial and temporal characteristics of extreme temperature events in the Huaihe River basin from 1961 to 2014 are analyzed from the perspective of trend and correlation,using statistical methods to calculate 26 extreme temperature indices.The regional response of climate change in the basin is further discussed by comparing with other regional temperature changes.The results are as follows:(1)The maximum ${T_{max }}$ and minimum ${T_{min }}$ rise by a wide range of significant trend,the largest increase was 0.4 ℃/10a and 1.3 ℃/10a.Warm night days,summer days,hot wave spell duration indicator,and others in the Huaihe River basin as a whole are on the rise.The warm evenings with hot night index showed a trend of wide range increases significantly,with an increase of 6.3 d/10a and 7.1 d/10a.(2)Cold days,cold nights,frost days,icing days,cold spell duration indicator,cold wave spell duration indicator and frost spell duration indicator have significantly decreased by -2.3,-6.8,-10.0,-2.5,-10.0,-7.3,-4.3 d/10a,respectively.(3)The diurnal temperature range in the Huaihe River basin is decreasing in general.The growing season length shows statistically significant increasing trends at rates of 7.6 d/10a,while the temperature index in the growing season length is slightly lower.(4)The extreme temperature indices of the Huaihe River basin have obvious differences in variation range,spatial distribution,time of mutation occurrence and correlation.In terms of change amplitude,the extreme cold index is greater than the extreme warmth index,and the night index is greater than the day index.On spatial distribution,the variation amplitude of these indices and significance test pass rate are greater in eastern region than in western region,and the increase of extreme warm indices in the southeast of the Huaihe River basin is far greater than in other areas.And extreme cold index mutations occur earlier than warm about 10 a.The most extreme temperature indices are correlated with the longitude,latitude and altitude.Particularly,the trend of main extreme temperature indices of the Huaihe River basin is consistent with regional and global scales.