The invention relates to a power distribution network graph model consistency verifying method and system in an off-line environment. The power distribution network graph model consistency verifying method comprises under the off-line environment, checking the basic attribute, of each kind of devices, in the model file of the power distribution network graph model in the leading-in phase, positioning each basic attribute to the concrete position of the model file; under the off-line environment, carrying out correlation verification on graphs and models of the power distribution network graph model during the leading-in process to generate a network topology, and checking the topological connection state of the power distribution network graph model in dependence on the network topology; under the off-line environment, carrying out mutual verification on the graph file and the model file of the power distribution network graph model, obtaining the difference between the graph file and the model file and carrying out correction, and ensuring the consistency of the power distribution network graph model. According to the technical scheme, the integrity and correctness of the led-in network model are integrally ensured.