Abstract: The paper aims to study the characteristics and rules of temperature change in Haidong, Qinghai in 1961-2015. The authors studied monthly temperature data during the 55 years from 5 weather stations in Haidong by using linear trend, Mann Kendall mutation test and accumulative anomaly analysis and so on. The results showed that: the annual average temperature, maximum temperature and minimum temperature had an evident warming trend, their annual growth rates were 0.33℃/10 a, 0.33℃/10 a and 0.43℃/10 a, respectively; from the point of decadal variability, the warming trend of average temperature and minimum temperature (maximum temperature) after 1990 (1980s to 1990s) was obvious; the average temperature, maximum temperature and minimum temperature of the four seasons had an evident warming trend with asymmetrical change characteristics, however, the minimum temperature had the most apparent warming trend, and warming in winter had the largest contribution to the increase of annual average temperature, the strength of warming of the average temperature, maximum temperature and minimum temperature in time and space showed inconsistency; the annual average temperature had mutations from 1996 to 1997, while the maximum temperature had a mutation in 1993.