In order to solve the problem of insufficient automation of the ramming system of rapid-fire mortar, a new ramming system with compact structure and stable and reliable ammunition feeding was designed based on 82 rapid-fire mortar, and a cross-platform co-simulation study of electromechanical system was carried out. The ammunition feed system adopts a disposable ammunition pod feed mode, can realize that arrangement of closely arranged ammunition bays, improves the ammunition carry capacity of the system, and can quickly complete the continuous automatic firing of mortars; In order to verify the feeding process of the ammunition feeding system, the multi-body dynamics model and the electromechanical co-simulation model of the ammunition feeding system were established by using the dynamics software Adams and the control analysis software Simulink, and the simulation analysis was carried out. The simulation results show that the dynamic characteristics of the control system are stable and controllable, which can provide a theoretical basis for the design of the physical prototype.