To　study　influence　of　typhoon　in　the　regional　air　environmental　quality　in　China,　this　paper　analyzed　the　important　pollutant　PM10　and　the　relevant　meteorological　data　during　two　typhoon　processes　in　2005.　Results　show　that　there　were　obvious　pollutant　processes　in　the　cities　in　China.　Based　on　the　data　of　regional　environmental　data　and　meteorological　data,　we　diagnosed　and　modeled　two　typical　processes.　Research　illuminated　that　the　typhoon　system　is　the　important　reason　for　the　heavy　pollution　in　some　cities　such　as　Beijing,　Shaoxing　in　the　outer　area　of　typhoon,　and　for　the　atmospheric　environment　background　in　this　region　is　very　useful　to　accumulate　pollutant.