Abstract: To meet the high reliability requirements of power supply for the distribution network, this paper develops a distributed self-healing control and protection device scheme based on HSR peer-to-peer communication, in coordination with the line differential protection. The device itself integrates busbar protection and fault location-isolation protection, and relies on the subscription and transmission of information from upstream and downstream substation areas. The scheme can achieve millisecond-level isolation of distribution network faults, and hundreds-millisecond-level single-loop self-healing and double-loop power transfer supply dual backup. Meanwhile, for the scenario where distributed small power sources are connected to the distribution network, the scheme proposes small power source tripping strategy during load transfer. Test result shows the device is accurate and can meet the high reliability requirements of power supply for the distribution network, also provides crucial technical support for achieving the target of 99.99% power supply reliability in urban core areas, as set forth in the Distribution Network Construction and Upgrade Action Plan (2015-2020). At present, the device has passed test and been applied to operation in Shanghai certain region 10kV double-loop power distribution.