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The rat damage is one of our country prairie most serious biology disasters. In recent years, prairie rat damage in Gannan Tibetan Autonomous Prefecture was serious day by day, because the rat damage caused the prairie to phenomena of degenerate, desertification, soil erosion and so on, to be very prominent, the prairie ecosystem encountered the heavy damage. Moreover every year prairie rat damage, the mouse open land in the big area proliferation, constructs the western ecology barrier for our country and north the ecology defense line, realizes the multi-national area stability and prosperity, the comprehensive construction affluent society has brought the serious negative influence. This article bases the Gannan reality, through all previous years investigation material’s reorganization analysis, in the throughout reconnaissance and in the key distribution area sample investigation’s foundation, has conducted the system research to the Gannan state rat damage regionalization, simultaneously to the rat damage distribution, host critical aspects and so on mouse’s characteristic, control technique and synthesis prevention and control strategy has made the comprehensive elaboration. The research indicated that the Gannan prairie altogether has the rodent 54 species, subordinates in 2 orders,7 families, among which rodents 5 families,46 species, rabbit shape order of 2 families,8 species. The common species are 19 species, subordinate in 2 orders,5 families.Based on the composes of rodent fauna, the zonality biological climate and the zonality vegetation, the Gannan prairie rat damage division will be 4 harm areas; by certain superiority zonality prairie type, the representative mouse class distribution and the dominant species, the Gannan prairie rat damage division will be 8 harm subareas.
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