The large scale spring dust storms (March—May) in central western Inner Mongolia are analyzed statistically by using meteorological data of 1961—2000. Based on the climatic features of precipitation, the whole region is divided into several parts in order to find the relationship between dust storms and rainfall. The results show that more dust storms are companied with less precipitation and more cold wave in springs. The subtropical high, the zonal circulation index of Asia, the 500hPa height of the Qinghai Xizang Plateau, Southern Oscillation, atmosphere circulation patterns of Atlantic Ocean Europe have some influence on dust storms.