Aviation instrument simulation is an important part in flight simulator. Considering current development of vitual reality technology and practical request of the flight simulator, this paper gives a description of virtual aviation instrument construction and application. The system uses professional software VAPS to design the appearance of aviation instrument simulation. It uses VAPS and C++ language to achieve the communication between the aviation instrument simulation. It uses C programming language to describe the VAPS Communications interface to other applications. The network communication uses UDP/IP. The simulation results show that VAPS modeling is a simple and efficient instrument. It provides a reference on virtual simulation technology.