The invention provides a communication network modeling analysis method for a physical information fusion system. The communication network modeling analysis method comprises a communication network modeling stage and a communication network communication performance analysis stage; the communication network modeling stage comprises a communication network node, communication network branch modeling and communication network modeling; the communication network communication performance analysis stage comprises searching a communication path by path search according to an established communication network model, calculating and analyzing the communication performance of the communication path by using a communication performance analysis function, and realizing mutual data connection with other applications in the communication network through an interactive interface, wherein the communication performance analysis is determined according to specific demands; and the communication performance of communication networks corresponding to different electric power applications can be analyzed to accurately research the influence of the communication information system to an electric power system, and provide foundation for overall modeling and analysis of physical electric power information fusion systems.