Abstract: To study the effect of rudder jam caused by missile strike on the ability of an aircraft to perform missions, a method to judge mission abort kill based on flight range was proposed. The aircraft trim process was discussed with the vertical and horizontal aerodynamic coupling caused by the rudder jam taken into consideration. The remaining flight range was calculated based on the trim solution of the damaged aircraft. The range threshold was calculated according to the flight mission profile, and it was compared with the remaining range to judge mission abort kill. Simulation examples were set and range losses of aircraft under different jammed angles were calculated, verifying the feasibility of the proposed method for judging mission abort kill. Results show that range loss caused by a small-angle jam is short. As the angle jam increases, the range loss increases rapidly and eventually leads to mission abort kill, and the range loss can reach 50%.