Abstract: It firstly analyses the weather phenomenon of sand-storm. There are three principal conditions of the formation, namely, sources of sand, strong cool air （gale）, little precipitation and air-drying. The formation of the three conditions attributes to the action of natural and artificial factors. Then it puts forward the measures preventing and controlling sandstorm in the respects of scientific research, management, tree and grass planting, construction of conservancy infrastructure and conservation of water and soil. Finally, it appeals for protecting ecology to prevent and control sandstorm.