Abstract: To meet the need of evaluating fight efficiency of modern aviation weapon systems, a scheme of air combat simulation system based on distributed interactive simulation (DIS) was presented. With describing the architecture, the function divisions and the critical technology points of the scheme, an experimental example of air combat simulation using this system in a virtual simulation environment was introduced. The simulation results showed that the new scheme can develop much better simulation content, scale, reality and reliability than traditional methods and so displayed broad application foreground.