Abstract: Based on the daily observation data during 1964 ~ 2012, the change of extreme weather in Ulam Wusu were analyzed by appling regression analysis method, three years moving average method, Mann- Kendall trend test for nonparametric test method and wavelet analysis method.Resultsshow that: 1) The thick fog events had the increasing trend but the gale weather, thunderstorms, sandstorm, sand and and thick fog events presented the declining trend. 2) The abrupt change of the average temperature, the extreme minimum temperature, the extreme maximum temperature, thick fog, light fog, sandstorm, sand and thunderstorms events occuranced in different year in the entire study period, and the average temperature, light fog, dust and thunderstorm events shortly reached a very significant increase or decrease trend, respectively. 3) There are obvious periodic oscillations existed in the trend of the average temperature, the extreme minimum and maximum temperature, the thick fog events, thunderstorm events and the gale weather, but the oscillations characters were different between six events. The dust, sandstorm and light fog events have no obvious periodic oscillations.