[Objective]The research aimed to analyze change characteristics and mutation situation of the temperature in Fangchenggang of Guangxi from 1955 to 2009. [Method] Based on actual temperature observation data in Fangchenggang of Guangxi from 1955 to 2009, by using linear trend estimation, Mann-Kendall and cumulative anomaly, change characteristics and mutation situation of the temperature in the city in recent 55 years were analyzed. [Result] Annual average temperature had an obvious rising trend in Fangchenggang in recent 55 years, which was basically consistent with that in whole country. Summer, autumn and winter average temperatures all had obvious warming trends except that the trend in spring. Summer, winter and annual average temperature jumps occurred in the 1980s. Autumn average temperature jump occurred in the end of 1970s while spring average temperature had no jump. The situation in winter was that a transition from low stage to high stage happened in the middle period of 1980s, while transitions of the annual, spring, summer and autumn average temperatures from low stage to high stage happened in the middle and later periods of 1990s. [Conclusion] The research provided decision-making basis for going after advantages and avoiding disadvantages, guiding agricultural production and using climate resource in the zone sufficiently and reasonably.
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