Abstract: Sandstorm is the direct result of adverse ecological environment.The essential approach in preventing and reducing sandstorm disasters is to improve the ecological environment.To improve ecological condition and its ability of regulating natural adv ersities,first of all is to guarantee the rational use and exploition of natural resources,especially water resources.According to the study of sandstorm's formation and the analysis of its history,we think that the development of the work to prevent and reduce adversities by means of ecological regulation,o n the one hand,should be emphasized on organically synthesizing geoscience,environmental science etc.,so that we can reveal the moving laws and the forming mechanism of strong sandstorm adversities;on the other hand,should be strengthened research on relationship between population,resources,environment and calamity through the analysing on mutuality of land desertification and strong sandstorm as well as the space-time features of windstorm.In order to carry out efficient and dynamic "ecological regulating-calamity controlling" system that guarantees against strong sandstorm and mo re fit modern society's continual development,we must make clear the ecological regulation function of the improvement of ecological environment in preventing and reducing strong sandstorm disasters under extreme climate condition,and passive system of meteorological calamity's forcasting and relieving.

Key words: strong sandstorm, ecological regulation, countermeasure, Ningxia