Wildfire　spread　is　a　complicated　phenomenon　that　affected　by　many　factors,　such　as　terrain,　vegetation,　and　weather　conditions.　This　paper　presents　a　wildfire-spread　simulation　and　visualization　method.　A　simulation　system　was　developed　based　on　OSG(Open　Scene　Graph)　and　FARSITE　(Fire　Area　Simulator).　The　system　can　visualize　a　realistic　3D　wildfire　scenario　considering　the　influence　factors.　Wildfire　is　rendered　by　particle　system,　while　LOD(Level　Of　Detail)　and　curve　morphing　technique　are　used　to　animate　the　flame　and　smoke　under　conditions　of　slope　and　wind.　During　the　propagation　of　the　procedural　wildfire,　the　appearances　of　burned　plants　are　changed　automatically.　The　wildfire　spread　is　visualized　according　to　the　calculations　from　the　wildfire　simulation　engine.　The　users　can　not　only　manage　the　objects　such　as　fire　lines,　fire-fighting　vehicles　and　water-bombers,　but　also　assess　the　damage.　©　2011　IEEE.