In order to effectively improve the effectiveness and rationality of the power supplier evaluation, this study designs a supplier evaluation model based on improved fuzzy comprehensive evaluation method. First of all, based on the present situation of supplier management, we construct the index system including organization factor, product factor, supply factor, after-sale factor, and social responsibility. Secondly, in order to avoid the subjectivity of the traditional fuzzy comprehensive evaluation method, AHP+FA combination weighting method is adopted to improve the weight calculation method. Finally, the applicability of the evaluation model is verified by the example analysis, which can provide reference for the bidding management and operation decision-making of power companies.