Abstract: This paper is presented in order to facilitate the fine distribution of emergency supplies for sudden disasters in accordance with the priority order of urgency, realize multi-level and fine management and to improve the efficiency of emergency rescue. Firstly, four grid resolution quadtree agglomeration hierarchical cloud meshing method was proposed based on the basic data of Wenchuan earthquake disaster area, such as administrative divisions, population and buildings distribution; then the indicators that affect the degree of disasters, including the average rate of earthquake intensity, ten thousand building collapse rate and survivor ratio, were determined and weighted. Finally, the spatial distribution of severity of disasters was analyzed according to the processing result of unit grid point data so as to decide the fine allocation priority of emergency materials. The results show that the different mesh resolution and classification of fragmentation at the boundary make the allocation priority of emergency supplies more precise.

Key words: disaster, emergency materials, allocation priority, hierarchical cloud grid, fine management