Abstract: In order to analyze the influence of aerodynamic characteristics of parachute-bomb system and its pneumatic characteristics on the dynamic stability of the system, the shape of non-symmetry bomb body was simulated contrastively in system dynamics and computational fluid dynamics. The flow field of the parachute and the bomb were simulated separately comparing with the test in wind tunnel. The simulate result provided datum support for optimizing aerodynamic characteristics of parachute-bomb system and advancing system's shooting efficiency. Through the ballistic trajectory simulation, the influence of the dynamic datum and opening umbrella time on the dynamic stability of the system was concluded. The result of this paper can indicate that the infection of the non-symmetry shape on the aerodynamic characteristics of bomb is less, the aerodynamic characteristics of system are stable, but the dynamic datum and opening umbrella time influence the dynamic stability definitely.