The visual simulation technology is an important branch of computer simulation technology, which can provide the users with scientific and effective technical means for evaluation of the design results by simulating the real environment. For the airport design, although the popularized logic calculation simulation is able to be used for quantitative analysis, it is still limited by the accuracy of the model and non-intuitiveness, with many difficulties in integrating the BIM design model, which faces many obstacles in carrying out deeper level, wider field, and wider range of technical research and application. Therefore, this paper explores a set of technical route to apply flight visual simulation technology and BIM technology to airport design optimization. The technical route is not only able to support BIM design model and GIS information to build real simulation environment, but also able to implement the real simulation and experience of planning and design results with aircraft as the main body, realizing the verification of flight procedures, which provides strong support for the display and evaluation of design results