Considering the limitation of the previous air combat modeling that only took into consideration of unilateral decision,a new 3D one-on-one air combat decision-making model is established which took into consideration of both sides decision.The influence diagram analysis method is employed to describe the pilot decision-making process.And the air combat dogfight is simulated in 3-dimensional environment.Simulation results showed that the new model could simulate air combat dogfight realistically,and the air combat decision method could solve the uncertain decision problems perfectly.The method pays attention to both attacking and defending,so it is suitable for many air combat conditions.