The invention discloses an efficient large-scale simulation scene modeling method and system for a power communication system. Model base support is provided for simulation scene modeling through a model layer, and the model layer comprises a meta model and a combination model; a modeling element and a modeling representation method are specified through a meta-model, wherein the combination modelis a function template constructed based on a meta-model; a text description file of the simulation scene is provided for the adaptation layer through the description layer; the description layer determines network core elements through a user-defined model and is used for shielding difference of modeling of different emulators; the description layer uses a model library to describe the network topology and parameters, and uses the semantic function of the abstract model to avoid the original model mode from describing the network elements one by one; the text description file is converted into a simulation file suitable for a simulator through an adaptation layer; the adaptation layer compiles model conversion middleware according to a unified interface standard and registers the model conversion middleware to the analyzer management module; and the parser management module is used for expanding according to semanteme, and the entity model is mapped to a target platform modeling specification.