By the analysis the characteristics of blown sand hazard in different time stages and higway sections, the conclusion is that the strength of blown sand hazard tends to weaker, that from the north to south of the desert highway the extent-dasmaged of the desert higway and its sand-control system drops to lower. Ths differences of the type and extent of blown sand hazard between the east and west sides of the desert highway as well as different geomorphic sections are evident. With the time going on, development pattern of blown sand hazard is that the area-damaged of sand-control system enlarges and the ratio of serious type of sand hazard increases.