Abstract: A method for developing virtual reality simulation system based on a Visual C++ and MultiGen Vega environment is studied.The development process of the virtual reality simulation system is described and the study on an anti-tank guided missile flight system is taken as an example.The results showed that the method proved its feasibility and practical value,that designers can directly analyze the flight trajectory,oversee the flight process,attitude and target movement. It is thus beneficial in the design of missile flight trajectory.