In order to further study the performance of gun recoil devices, and speed up the research period and improve efficiency, the feasibility of researching the recoil devices by simulink was presented. The kinematics differential equation was established by analyzing the motion process of the recoil devices. Based on that, the simulink model was set up. The simulation results showed that: the simulation results basically complied with the recoil devices which provided a platform for researching and analyzing the recoil devices.