Abstract: In order to increase the credibility of driver-vehicle-road system simulation, based on the method displaying English character by using the Vega API and Symbology module, this paper introduces the technical principle of dynamically displaying Chinese and English mixed character in Vega simulation thread by use of OpenGL, and puts forward a new method for flicker-free display of dynamic information on the basis of callback function and OpenGL, and provides the pseudo-code segments of implementation on the basis of visual C++ development platform.