The embodiment of the invention, which relates to the technical field of network survivability of a power backbone network, discloses a method and apparatus for network survivability evaluation. The method comprises: preset correction parameters of a power backbone network are obtained, wherein the preset correction parameters at least consist of a topographic parameters, a meteorological parameter, an electric load rate parameter, a line intensity parameter and a network connectivity parameter; according to an evaluation difference quantity of evaluation on network survivability by the preset correction parameters, scoring results of the preset correction parameters are obtained; on the basis of the scoring results of the preset correction parameters, values of the preset correction parameters are determined; and a product of the values of the preset correction parameters and an evaluation value of a pre-established network survivability evaluation system is used as a network survivability evaluation value having a territorial constraint and the network survivability is evaluated by using the network survivability evaluation value having a territorial constraint. Therefore, an error on network survivability evaluation of a power backbone network by geographical factors can be compensated; and thus the obtained network survivability evaluation value becomes accurate.