In the field of virtual reality, tree modeling and rendering technique is a hotspot. This paper summarizes the current basic methods of tree modeling and rendering. At first, we present basic principles of making tree models, then show the two methods of tree modeling and rendering used in game scenes in virtual reality. One is the tree modeling technique based on 3Dmax, the other is the tree rendering technique based on OpenGL. At last we give the application examples of these two methods and compare the two methods in navigation system project.