Abstract: In order to master the characteristics of temperature variation over Linyi City, providing theoretical basis for carrying out research of the agriculture critical temperature and accumulated temperature, and so as to serve the analysis and regionalization of the agro-climatic heat resource and agricultural weather forecasting and intelligence well in Linyi Region. Based on the air temperature data of Linyi from 1961 to 2011, the author mainly analyzed the characteristics of temperature variation over Linyi City in recent 51 years (including the annual and each quarter of the average temperature, annual extreme maximum, minimum temperature and the mean daily maximum, minimum temperature) with linear trend estimation, accumulative anomaly, Mann-Kendall. The results showed that: the warming trend of temperature was very obvious in recent 51 years of Linyi, and the increase rate was higher than the national average level, the annual average temperature increased by 0.25℃every decade, and there were significant differences between the four seasons, the most obvious trend reached to 0.49℃every decade in the winter, spring followed by rising 0.30℃every decade, and 0.24℃rising every decade in autumn, summer was insignificant just 0.03℃every decade; in aspects of the maximum and minimum temperature, the annual extreme minimum temperature was the most significant by rising 0.95℃per decade, 0.40℃rising every decade in the mean daily minimum temperature and 0.14℃rising to the maximum one, while the annual extreme maximum temperature presented a weak cooling trend, the largest contribution to the growth of the annual average temperature was the rising of the winter average temperature and the mean daily minimum temperature; the air temperature had an obvious warming mutation in the late 1980s to the early 1990s.