The D-S evidence theory, which provides a method of efficiently solving uncertain information reasoning and integration of the multiple data source, can synthesize independent evidence and give consistent results. In addition, it also deals with synthesis problems of fuzzy and uncertain information in order to achieve complementary information. Compared with other reasoning methods, this evidence theory is much more similar to the decision process of human-beings. Therefore, in this paper, a disaster decision method based on DS evidence theory, has been proposed, and its effectiveness and feasibility have also been proved, according to the experimental results.