In order to quantitative analyze the climate variation characters and tendency of Inner Mongolia desert steppe at different time scales,the present research employed monthly average temperature,precipitation and average wind speed from 9 meteorological stations around desert steppe area and surrounding regions during 1961 - 2011 to understand the basic climate of desert steppe and diagnose the yearly and monthly variations tendency and degree of the above 3 factors. The results showed the mean annual temperature of Inner Mongolia desert steppe significantly increased in the 1990s,increased by 2. 7 ℃ after 2000 in the western region,increased by 4 ℃ in February. The annual precipitation has no significant variations with the yearly 5% changes in most regions,however,the winter precipitation increased significantly in northern and south-central and the spring and autumn precipitation decreased in the west. The annual mean wind speed slowed down by 0. 1 ~1. 4 m·s~(-1) since the 1980s,and it slowed down more in spring and winter.