Abstract: To address limited equipment-state checking, topology distortion caused by abnormal remote signals, and insufficient post-operation verification in distribution automation master stations, a topology-state-based anti-misoperation method is proposed. A real-time topology model integrating static network models and dynamic switch states is established. State credibility checking, local topology searching, and virtual switch-state transition are used to identify loop-closing, power-loss/restoration, and grounded-area energization risks. Post-operation verification is further performed using remote signals, SOE information, and reconstructed topology. Engineering replay tests show that the proposed method achieves an identification accuracy of 98.88%, reduces the omission rate of risky and abnormal operations to 1.40%, and requires an average pre-operation checking time of 0.46 s.