The configuration characteristic of level and protective backup is introduced to intelligent distributed Feeder Automation (FA), then a new distributed feeder automation algorithm with level and protective backup is proposed. This algorithm defines the zone and level polarity of one circuit distribution terminal according to distribution network topology and power supply direction, meanwhile adopts multicast transmission to realize intelligent distributed FA communication, and eventually realizes fault fast isolation and non-fault area restoration. RTDS simulation and on-site experience show that the proposed method can solve the fault quickly; when the terminal communication fault or lower switch operation failure, the upper switch will operate automatically. It can both decrease the failure interruption time and increase the reliability of distributed FA system. This work is supported by Electric Power Research Institute of Guizhou Power Grid Co.,Ltd. (No. GZ2015-2-0052).