For research influence of weapon design parameter on automata dynamic feature, take a new automatic launcher system as research object to carry out simulation and kinematics simulation research. Based on current 3D model, establish system multi-rigid-body dynamic model, use ADAMS software to simulate kinematics, and verify reliability of automata movement. According to the transmitting device of the curved & direct compatibility, point & area denial effect and the double-acting shock absorber of the barrel, and the emission of two different ammunition (wearing a bomb and grenades) and no shock front conditions model, automata motion characteristics analysis, verify the compatibility emission characteristics; by changing the design parameters that the influence of parameter changing to the automaton movement. The results show that the influence of the weapon design parameters on the motion law of the automaton is not a specific law. The designer must comprehensively analyze the influence of the parameters on the motion characteristics, and find the best parameter matching scheme.