When　flying　at　high　speed,　material　properties,　stress　state　and　structure　configuration　of　the　aircraft　will　be　changed　under　high　temperature　environment　caused　by　serious　aerodynamic　heating.　In　this　condition,　the　performance　of　aircraft　during　working　period　may　be　quite　different　from　design　performance.　This　paper　presents　a　numerical　research　on　the　vibro-acoustic　response　of　aircraft　under　thermal　environment.　The　influence　of　thermal　stress　on　dynamic　characteristics　is　studied.　The　finite　element　equations　which　consider　stress-stiffness　effects　are　formed　for　vibro-acoustic　dynamic　analysis.　Numerical　results　show　that　thermal　stress　has　greater　effect　on　higher　order　modes　and　influences　the　response　peak.