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Based on the data of monthly mean maximum and minimum air temperature, mean temperature at 14:00 and 02:00 in Xishuangbanna from 1961 to 2010, and using climatic statistic methods, the trends of the mean maximum and minimum air temperature, abrupt climate change, and anomalous years are studied. The results show that except spring mean maximum temperature and mean temperature at 14:00, annual and seasonal mean maximum and minimum temperature, mean temperature at 14:00 and 02:00, etc., all increased, with the increasing rate being 0208 to 0544 ℃ per 10 years, the largest increase in winter. Mean maximum and minimum temperature showed an abrupt change in 1978, and in the period before the abrupt change, it was colder and in the period after it was warmer. Before the abrupt change, the mean minimum temperature decreased obviously, but after the abrupt change, the mean minimum temperature was significantly higher. The abnormal low maximum and minimum temperature were normally appeared in the 1960s and 1970s, and abnormally high temperature mainly occurred after the 1980s of the 20th Century, especially since 2000.