Wildfires　have　become　an　important　factor　threatening　the　safe　and　stable　operation　of　transmission　lines,　and　large-scale　wildfires　can　significantly　reduce　the　air　gap　insulation　level　of　transmission　lines　and　cause　line　tripping.　Therefore,　based　on　the　principle　of　cellular　automata　and　Wang　Zhengfei＇s　model　of　wildfire　spread,　this　paper　analyzes　in　detail　the　effects　of　factors　such　as　slope,　wind　speed,　wind　direction,　and　fuel　type　on　the　speed　of　wildfire　spread　and　the　area　of　the　fire　site,　and　predicts　the　time　when　the　wildfire　arrives　below　the　transmission　line.　The　results　indicate　that　the　established　model　can　preliminarily　reflect　the　spread　law　of　wildfires,　and　has　a　certain　guiding　role　for　the　safe　and　stable　operation　of　the　power　grid.　©　Beijing　Paike　Culture　Commu.　Co.,　Ltd　2024.