The invention discloses a cutover process control method and device of electric power communication network services. The method comprises that network service nodes to be cut over establish a servicesource and destination node topological graph; a node in a close relation side is selected; a node of maximal node degree is selected, and forms a first sub graph with an adjacent node; the connectivity of the first sub graph is calculated; nodes enabling the maximal connectivity of the first sub graph are taken as selected nodes, a side between the selected nodes is removed from the service source and destination node topological graph to obtain an updated service source and destination node topological graph; nodes are selected from the service source and destination node topological graphsuccessively till all the sides in the service source and destination node topological graph are removed; and service cutover construction is arranged in the node selection sequence. Thus, the servicecutover period is shortened, and safe and reliable operation of the communication system and power grid are guaranteed.