In the paper, the fact that the existing satellite navigation signals’ simulators can not accurately simulate realistic motion information of an aircraft is researched. Based on the solution of inverse and direct problem of earth ellipsoid, a great circle route calculation model is presented. Considering the actual aircraft the entire process of the aircraft flight path simulation which includes three-dimensional attitude information is given. Based on this, a simulation demonstration program is designed to set dynamically route parameters. The simulation has shown that the proposed simulation method is used to accurately track and simulate the actual motion characteristics of an aircraft so as to support the research on other corresponding navigation system.