Abstract: Constructing virtual natural environment is a key technology to virtual geographic environment.We analyze forest environment components,and discuss the methods of modeling and visualization of forest environment element.We assure that the virtual forest fire fighting environment is made of terrain,tree,forest fire and fight tools.Based on HLA/RTI protocol,a distributed virtual forest fire fighting environment prototype is designed and implemented.The 3D virtual forest fire fighting environment is generated by the prototype system.The bottom communication layer,the framework of model control layer and 3D graphics rendering are separated to form an independent module in the system,which made the system scalable and reusable.