The invention provides a performance optimization method based on routing simulation. The method comprises the following steps: setting a virtual router between a real host and a virtual host, processing the data from a network simulation running platform to forward to a target host, and encapsulating a message externally sent by the virtual host into a data frame to be sent to the network simulation running platform. The invention provides a performance optimization method based on routing simulation, the integral architecture of the protocol cannot be changed, the network and the configuration parameter are autonomously constructed so that a good environment for the analysis of the network attack and the defense is provided.