According to the transformer supplier comprehensive performance evaluation method under the perspective of operation and maintenance overhaul, transformer operation performance information is increased, supplier evaluation dimensions are enriched, and certain guiding significance is achieved for material management holographic bidding and operation and maintenance overhaul strategy differentiationmaking. In the aspect of evaluation indexes, the initial purchase cost, the operation and maintenance overhaul cost, the overhaul cost, the operation and maintenance workload, the safety level and other factors of the equipment in the enterprise resource management system and the equipment operation and maintenance lean management system are comprehensively considered, so that the supplier evaluation system is more reasonable; In the aspect of model evaluation, the weight of each evaluation index is determined by using an analytic hierarchy process, after data consistency inspection, the comprehensive score of each supplier is calculated, the supplier level is determined by combining a quinary method, supplier common characteristics are mined, and a supplier comprehensive performance evaluation result is formed, so that the evaluation result is more scientific.