Abstract: In order to increase the fidelity and credibility of the driving simulation system，this paper establishes the intelligent driving behavior model of virtual autonomous vehicle，on the basis of micro-macro external road environment. Also，a simulation method based on local information perception and stochastic decision making has been proposed to improve the probability of independent intelligence vehicle and real-random driving behavior. Finally，the result illustrates the driving behavior of virtual autonomous vehicle can be realized by using these methods，which simulate real traffic environment and also enhance authenticity and real-time capability of system.