Route distribution method and device for relay protection service

The invention provides a relay protection service-oriented route distribution method and device. The method comprises the following steps of: obtaining a relay protection service to be distributed; determining an alternative path set and a target shortest path of the relay protection service through K shortest path algorithms; according to the field sequence of the routing intersection degree, the whole network service average risk degree and the port load balance degree, the alternative paths and the ascending order being sorted in sequence, wherein the first path is selected as the optimal alternative path, the target shortest path serves as the main route, and the optimal alternative path serves as the alternative route; acquiring a relay protection service to be allocated; determining an alternative path set and a target shortest path of the relay protection service through K shortest path algorithms; and sorting the alternative paths according to the routing intersection degree of each alternative path i