Abstract: Given the adaptability challenges posed by the widespread integration of distributed generation to the distribution network protection system, this paper analyzes the mechanisms behind the failure of traditional protection configurations, constructs a hierarchical protection architecture. The paper proposes dynamic setting and fault-tolerant scheduling control strategies, elaborates on the application of composite criteria in fault identification, and introduces the communication coordination mechanism of the protection system. Through simulation modeling and response analysis based on typical node-fault scenarios, the proposed strategy significantly improves fault-identification accuracy, action timeliness, and system robustness.