The invention relates to a double-route configuration method and a double-route configuration device for a power communication network, and belongs to the technical field of power communication. The method is improved based on a maximum disjoint algorithm, uses a relay and a risk degree as weights, plans a route for an existing business in network topology of the power communication network, and selects out a main path and a standby path of the business. According to the method and the device provided by the invention, by adding delay and risk constraints in a Bhandari algorithm, two disjoint paths can be acquired, and the main path has the shortest delay and the standby path has the minimal risk degree, so that normal transmission of the power communication network business is ensured, and thus the method and the device are more applicable to route configuration of the power communication network business.