Abstract: Aiming at the deficiencies in the current self-healing schemes for single-loop dual-cascade distribution networks, such as the difficulty in fault isolation following breaker failure, aggravated overload risk during load transfer, and protection miscoordination under loop closing operation or distributed generation access conditions, a novel self-healing control strategy based on a distributed peer-to-peer decision making paradigm is proposed. Based on GOOSE communication, this strategy realizes coordinated control of upstream and downstream breakers to ensure reliable fault isolation. By adopting hierarchical and sequential load shedding, it maintains continuous power supply for critical loads. In addition, entire topology information is obtained through peer-to-peer communication, which effectively resolves the difficulty in protection settings calculation. Real-Time Digital Simulator (RTDS) results demonstrate that the strategy features precise operation and can achieve millisecond-level fault isolation and hundred-millisecond-level self-healing load transfer, satisfying the demands of high-reliability power supply.