The　traditional　method　for　simulating　the　behaviors　of　forest　fire　is　to　use　a　single　ellipse　to　represent　all　of　the　fire　points　in　fire　scene,　which　has　many　disadvantages,　e.g.,　the　simulated　result　is　quite　different　to　the　real　situation,　and　it　is　mainly　based　on　2D.　As　a　result,　the　represented　information　is　limited.　In　this　paper,　the　most　widely　used　Rothermel　fire　spreading　model　and　the　principal　of　Huygen　were　adopted　to　simulate　the　behaviors　of　forest　fire　in　different　position　and　wind　direction,　and　the　results　were　shown　by　pseudo-particle　system　in　3D,　which　could　not　only　get　the　area　of　fire　suffering,　the　direction　of　fire　spreading　and　the　size　of　fire,　but　also　provide　realistic　simulation　to　observers.　The　method　has　been　successfully　applied　to　Zhangpu　forest　in　Fujian　Province.