This　study　is　to　find　an　airfoil　with　good　stability　and　high　lift　drag　ratio　and　to　improve　the　aerodynamic　performance　and　stability　of　turbomachinery　and　aircrafts.　Inspired　by　the　unique　airfoil　structure　of　seagull　wing　with　perfect　gliding　performance,　the　airfoil　profile　of　seagull　wing　is　extracted　and　restructured　firstly.　Then　the　aerodynamic　performance　and　flow　field　characteristics　of　the　bionic　seagull　airfoil　under　different　Reynolds　numbers　and　different　angles　of　attack　are　revealed　through　numerical　simulation　and　are　compared　with　those　of　the　NACA4412　airfoil.　The　results　show　that　in　the　static　aerodynamic　characteristics　of　airfoil,　the　lift　coefficient　of　the　bionic　seagull　airfoil　at　different　Reynolds　numbers　is　higher　than　that　of　NACA4412　airfoil,　and　the　lift　to　drag　ratio　is　higher　than　that　of　NACA4412　airfoil,　which　means　the　bionic　seagull　airfoil　has　higher　efficiency.　In　the　dynamic　aerodynamic　characteristics,　the　peak　value　of　lift　coefficient　of　the　bionic　seagull　airfoil　at　different　Reynolds　numbers　is　also　higher　than　that　of　NACA4412　airfoil,　while　the　stall　vortex　of　the　seagull　airfoil　is　smaller　than　that　of　NACA4412　airfoil.　Therefore,　the　bionic　seagull　airfoil　has　the　characteristics　of　high　lift　to　drag　ratio　and　excellent　stability,　and　these　aerodynamic　characteristics　are　beneficial　to　the　smooth　operation　of　rotating　turbomachinery　and　aircrafts.　©　2020,　Editorial　Office　of　Journal　of　Xi＇an　Jiaotong　University.　All　right　reserved.