This paper expounded the features of the buildings and analyzed the seismic disaster characteristics of the Jiuzhaigou M_S7.0 earthquake from Songpan to Jiuzhaigou. The new buildings(especially the frame structure)had a good anti-seismic performance in this area. The entirety of the brick-wood structure and the brick-concrete structure were poor, and they were widely damaged in the earthquake. By computing seismic damage index, we found that:the seismic damage index of the frame structure was far less than that of the civil structure and brick-wood structure. The seismic damage index of frame structure was all zero in the Ⅵ area. It was going up rapidly when the intensity increased, but the increasing degree slowed down. Finally, we discussed how to evaluate the intensity in the areas where there were fewer buildings or there was only one structure type, and we offered some advice for future field work reference.