In order to overcome the the shortcomings of traditional mechanical and electrical system simulation that only focused on electrical or mechanical, the joint simulation of the cross-platform was studied. On the basis of analyzing the mechanical-electronic co-simulation’s process of the remote weapon station and the work of the remote weapon station servo system, the mechanical dynamic model and the mechanical-electronic co-simulation platform of remote weapon station were built by the mechanical dynamic analysis software ADAMS and control simulation software MATLAB/Simulink. And the servo system of remote weapon station’s dynamic characteristics was analyzed. The analytical results have been applied to evaluating the model as well as the simulated model, which will provide the theoretical references for the development of the robot weapon station.