Abstract: Under the background of climate warming, it studied the changing characteristics of 0℃ boundary temperature of Linfen, in order to provide scientific basis for agricultural production. Based on the daily air temperature data of 17 meteorological stations from 1981 to 2014, by using the linear trend estimation method, moving average method, the M- K method, and anomaly, several elements were analyzed, including the beginning day, ending day, duration and accumulated temperature of the daily temperature above 0℃ stably. The results showed that the beginning day was in advanced, the ending day delayed, the duration was increased 3.9 days per decade, the ahead of beginning date was greater than the ending date delay, and the accumulated temperature of the daily temperature above 0℃ stably had an increasing trend, which increased 115.4℃ per decade in Linfen, mutation in 1993, increasing significantly enhanced after 2000; from regional distribution, central regions above 0℃ began earliest, ended latest, duration longest, the accumulated temperature above 0℃ was most abundant, the west mountain was conversely, the east mountain was between the two. The impact of climate warming to the agricultural production must be comprehensive researched.