Aiming at the problem of energy consumption in the virtual network mapping, according to the characteristics of the virtual network reconfiguration and energy consumption of substrate nodes and links, a reconfiguration optimization model of mapping virtual networks is proposed. By setting resource utilization threshold in the substrate network, virtual nodes that are already mapped onto substrate nodes, which resource utilization is greater than the high threshold or less than low threshold, are remapped onto the substrate nodes consuming smaller energy periodically, the same operation as the virtual links. By using the method of hibernating and waking up substrate nodes and links, the number of active substrate nodes and substrate links in the substrate network are adjusted dynamically. Simulation results show that EEVNR algorithm balances the substrate nodes and links load effectively, improves the acceptance ratio of virtual network requests and reduces the system energy consumption of mapping virtual networks evidently.