In order to evaluate risk of coal spontaneous combustion more reasonably, a multi-index evaluation system is proposed . According to the principle of minimum information discrimination, combining the advantages of both qualitative and quantitative weighting methods, a combined weighting determination method is proposed, and an evaluation model is constructed based on TOPSIS. The method is adopted to appraise fifteen samples in different coal mines. The results of the evaluation a consistent of the investigation. The results help to scientifically evaluate the characteristics of coal spontaneous combustion from different coal faces, as well as optimize the program of spontaneous combustion prevention for managers.