Abstract: Based on annual average temperature and annual precipitation data in eight stations of Alxa League from 1960 to 2012, the changing trend, mutation time point, cycle characteristics of annual average temperature and precipitation in recent 53 years were analyzed by using climatic statistics methods. Results showed that in recently 53 years, the temperature in Alxa League increased significantly, with the increasing rise of 0.33 ℃/10a; the change trend of annual precipitation was not significant, but year variation was great, and the minimum and the maximum annual precipitation differed probably 1.6 times. The annual average temperature had obvious characteristics of the mutation, and the mutation time point was 1987-1988, subsequently the average temperature increased significantly, while the annual precipitation had no obvious mutation characteristic. The annual average temperature had no significant cyclic fluctuation in 53 years time scale,and four years cycle existed between 1980 and 2000. Wavelet cycle characteristics of precipitation was more complex than temperature and showed the characteristics of multi-period superposition. From the 1970＇s of the last century to the end of the last century, the fluctuation of precipitation was more complex and existed significant periodic variations of 12, 9 and 5 years.