Abstract: Based on the temperature data of Kuandian Station from 1960 to 2010,the variation characteristics of thermal resources in Kuandian County in the past 50 years were analyzed by using the one-variable linear function.The results showed that the annual average temperature of Kuandian Station was increased by 1.8 ℃ in the past 50 years,and the temperature in spring,summer,autumn and winter was increased by 1.5,0.9,1.0 and 4.0 ℃,respectively;the temperature rising period mainly distributed in November to February;≥10 ℃ accumulated temperature was increased by 212.6 ℃;the frost-free period was extended by 20 days.The period from 1980 to 1989 was the inflexion of the temperature variation;after that period,the annual average temperature was averagely increased by 1.2 ℃,and the average temperature in the four seasons was increased by 1.1,0.7,0.6,3.5 ℃,respectively;≥10 ℃ accumulated temperature was increased by 148.1 ℃;the frost-free period was averagely extended by 13 days.