Abstract: This article proposes a regional protection and self-healing scheme based on SAP-953 distribution network multi-terminal differential station terminal to address the problems of slow fault handling and large power outage range in traditional centralized feeder automation of distribution networks. This terminal integrates fiber optic and 5G differential protection，with distributed FA function，which can achieve fast fault location，minimum range isolation，and millisecond level power supply recovery. Compared with traditional overcurrent protection，it has significant advantages in isolation speed，action time，and communication adaptability. Practical applications have shown that this solution supports multi communication redundancy, high integration, and convenient transformation. It has been piloted in Suzhou, Wuxi, and other places, effectively improving power supply reliability and self-healing capabilities.