In this paper first , the application of the OO method is discussed in the design of the radar target track simulation system , then the target movement model and the programming model based on OO are set up , and finally the software implement based on VC++. is introduced. The radar target track simulation software is made based on the design model , and is put mto action. Proved by practice the design model is true and reasonable. it has a good utility value. It is praised by aerial defense army.