The invention provides a fuzzy comprehensive evaluation method for security risks of power supply enterprise electronic files, which belongs to the electric digital data processing field. The fuzzy comprehensive evaluation method comprises the steps of: establishing a physical security evaluation index, a management security evaluation index, a network security evaluation index, an information security evaluation index and a system security evaluation index for the power supply enterprise electronic files firstly; respectively determining weights of factors and membership grade vectors thereof to obtain a fuzzy evaluation matrix; and calculating the fuzzy evaluation matrix and a weight set of the factors finally, and making reasonable comprehensive evaluation of an evaluation objective. The fuzzy comprehensive evaluation method is adopted for evaluating the indexes, the ''qualitative'' factors are associated with electronic file security management, and evaluation results of the indexes in all levels of an index system are obtained, thereby achieving security risk evaluation of electronic files objectively and comprehensively, and providing reference proposals for improving electronic file management. The fuzzy comprehensive evaluation can be widely used in the fields of security risk evaluation and security management of power supply enterprise electronic files.