| The article collected the research and literature of locust disaster status at home and abroad, and overview of the occurrence of locust ecology more systematic, Predicted the main types and characteristics about locusts in Inner Mongolia grassland,The article bases on the conditions of Inner Mongolian grassland locust generation, grassland climatic characters and ecological environment, adopts temperature, precipitation, cold air activity, drought and circumfluence etc., studied grassland locust habitat, overwintering ovum survival, hatch, larva feeding and growth and influence mechanism, filtrated synoptic factors and circumfluence background indexes that influence grassland locust, finally, constructed "the synoptic forecast model of grassland locust generation area and stages " to forecast validly and guide accurately the prevention and cure of locust.According to the needs oflocust right conditions of temperature and humidity and plant nutrient , This paper selected the key factor about locust affected.The results showed that the climatic conditions had great effected on locust survival, habitat and community change. More earlier that the appearance time of autumn first cold wave, more hurt to ovum; Soil temperature and moisture had an synthetical effect on locust in spring season.; During last spring to early summer, for minimum temperature increase, locust larva meet hardly killing temperature; high temperature of annul mean temperature, winter, spring, autumn seasons had an advantageous influence; Besides of annual precipitation, locust generation had consanguineous relationship with seasonal precipitation, especially autumn.Through the analysis of the key climatic factors and atmospheric circulation features that have obvious impact on the survival and reproduction of locusts. With the statistical regression analysis of locust area, population density and the occurrence of, we builted the MRF model about locust area, population density, the results were very good.
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