The invention provides a distribution network fault processing method based on 5G communication technology. In view of the shortcomings of conventional various distribution network fault processing modes, such as long fault processing time, high construction cost, and poor selectivity, the distribution network fault processing method of the invention, by means of the characteristics of low latency, high bandwidth, stable transmission of 5G communication, uses the 5G communication as a fault signal transmission channel, comprehensively takes account of the technical indicators of 5G communication, such as the transmission delay, the packet loss rate and the like, achieves high reliability, good selectivity and good fault tolerance based on fault information interactive transmission and logical strategy between terminals, realizes fast fault location and isolation of feeder line faults within 200 milliseconds and automatic restoration of power supply in non-fault areas, realizes the transition of the distribution network fault processing from a minute level to a millisecond level, achieves smaller area of power outages, less number of power outages, shorter call waiting time, and significantly improves the reliability of a distribution network.