Air temperature data in the North of Anhui Province form 1958 to 2007 were analyzed in seasons and years based on Linear Tendency method, Cumulative Anomaly method and Mann-Kendall method. The results showed that the mean annual temperature form 1958 to 2007 increased obviously with the tendency rates of temperature between 0.16-0.34 ℃/10 a; The most evident warming occurred in winter and spring. Decadal trend was down after the first rise. The regional annual average temperature anomalies were negative from 1960s to 1980s，and the average annual temperature anomalies were positive in 1990s and years 2000-2007. Results also showed that there was obvious abrupt change of air temperature in the North of Anhui Province, which was occurred form the later 1980s to the early 21st century.