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.