Abstract: Based on monthly average air temperature data in Jinzhou from 1954 to 2005,the seasonal and annual average air temperature changes were analyzed by linear trend method and moving average method.At the same time,the abrupt change of air temperature was determined by sliding t-test method.The results indicate that air temperature change takes on an obvious ascending trend during the recent 50 years in Jinzhou.The abrupt change of air temperature appears in the late 1980s.Since then,air temperature always keeps the higher value.According to agricultural station data in the suburb,the effect of urban heat environment on air temperature was analyzed.It states that the effect of urban heat environment on air temperature is one of main reasons causing higher temperature in Jinzhou since the 1980s.