Abstract: As the most critical equipment in the distribution system, the operating conditions of distribution transformers determine the power quality of users and the safe and stable operation of the distribution system. Therefore, it is of great significance to evaluate the status of transformers in operation. This article proposes a method for evaluating the status of distribution transformers based on online measurement data. Firstly, a system for evaluating the status of distribution transformers is established, and the numerical values of the status indicators of distribution transformers are obtained through intelligent oil level gauges, intelligent meters, and related research methods; secondly, the weights of each indicator are redistributed through the analytic hierarchy process(AHP); finally, the membership degree of each status evaluation indicator is determined through the fuzzy membership function and combined with the corresponding weights of each indicator, thereby obtaining the comprehensive status evaluation results of the transformer.