Aiming at the resource consumption of the virtual network mapping in the elastic optical network, we propose a node-first virtual network mapping algorithm considering the influences of the node and the link on resource requirements of virtual network mapping. Virtual nodes are firstly sorted according to the node weight and physical nodes which meet the resource requirements are then allocated for virtual nodes by the greedy principle. Finally, the virtual links are mapped to the shortest non-loop physical path by coordinated mapping. Simulation results show that the proposed algorithm can reduce resource consumption of virtual networks and the blocking probability of network request.