Abstract: Based on data of monthly average maximum temperature, minimum temperature and daily temperature range of Hulunbuir for 53 years from 1961 to 2013,using of method of test of significance, the change trend of monthly average maximum temperature, minimum temperature and daily temperature range in the area were researched. The results showed that： the monthly maximum temperature of every stations showed a increased trend except some stations showed a downward trend in January and December, and there was a significant upward trend in 5,7,8,9 months, the most significant in August and through the significance test of 0.001 in vast majority of stations; The monthly minimum temperature of every stations showed a increased trend except Manzhouli and Eerguna showed a downward trend in January, and the most stations each month through the significance test of 0.01 in addition to several western stations was not significant in1,2and 12 months, the most significant in3,4,5 and 6 months through the significance test of 0.001.The average diurnal temperature range showed a downward trend at most stations in other months of the year except that most stations was increasing trend in 8 and 9 months. Under the background of global climate warming, the monthly minimum temperature rise around is more obvious than the maximum temperature in Hulunbuir, the average rate of change was 0.20-0.40℃, （10a）-1; The diurnal change trend of temperature was decreased because that the minimum temperature increase was significantly higher than that of the highest temperature; The diurnal temperature range were between 11-17℃,it is larger in the north and east station in between 15-17℃,the rest area is 11-13℃.