By using the date of snow cover days and snow depth of 17 weather stations which above 1 000 m above sea lerel during the year of 1961-2006 in Tiashan Mountain, Xinjiang Uighur Autonomous Region, china, the inter-annual temporal and spatial characteristics were analyzed. Based on the time of the most snow depth days appeared, the 17 weather stations were divided into 4 types, and by integrating the change trend of the snow cover days and snow depth, we found three types of change trend. The results showed that: ①There are four snow depth types in Tianshan Mountains. The most snow depth occurs in January, February, March and double maximal values. The month of the most snow depth has a good relationship with the elevation. ②Both the snow cover days and maximum snow depth are both increase. Winter snow cover days occupy 50 percents of the whole year and, the maximum snow depth occur frequency became increasing trend in the 90th. ③Based on the change trend of snow cover days and maximum snow depth, there are three types of snow change. There are no change trend between snow cover days and elevation, but there are an obviously increasing trend between maximum snow depth and elevation. ④Based on the analysis of precipitation, temperature, humidity and the temperature below 0 ℃ days, the main reason of snowcover increase is because of the increasing of winter precipitation and humidity.