In　order　to　improve　the　aerodynamic　performance　and　reduce　the　energy　consumption　of　the　cross　flow　fan　in　the　air　conditioner,　the　bionic　airfoil　inspired　by　the　bird　wing　structure　is　designed　and　numerically　studied　for　the　impeller　of　the　cross　flow　fan.　Firstly,　the　airfoils　at　40%-span　of　the　long-eared　owl　and　the　seagull　with　perfect　aerodynamic　performance　are　extracted　for　the　reverse　reconstruction.　The　bionic　blades　are　designed　with　the　bird　wing　thickness　distribution　features　and　modified　considering　the　blade　strength　and　the　process　conditions　before　application.　Then,　numerical　simulation　is　conducted　to　investigate　the　impacts　of　two　kinds　of　bionic　blades　on　the　internal　flow　field　and　aerodynamic　performance　of　the　cross　flow　fan.　Finally,　experimental　study　is　performed　to　measure　and　verify　the　improvement　of　the　aerodynamic　performance　of　the　cross　flow　fan　by　using　bionic　blades.　The　research　results　show　that　the　leading　edge　shapes　of　the　two　bionic　blades　can　effectively　suppress　the　separation　vortex　at　the　outer　edge　of　the　impeller　and　reduce　the　blockage　at　the　inlet　side　of　the　blade　passage.　The　secondary　flow　formed　by　the　boundary　layer　accumulation　on　the　inlet　side　of　inner　circumference　is　improved　by　the　two　kinds　of　bionic　blades,　and　this　improvement　for　the　bionic　impeller　inspired　by　long-eared　owl　with　drastic　changes　in　the　leading　edge　thickness　is　more　obvious　at　low　rotating　speeds.　On　the　other　hand,　the　strength　of　the　eccentric　vortex　is　improved　by　using　the　two　kinds　of　bionic　blades,　hence　contributing　to　the　higher　outlet　velocity　and　impeller　efficiency.　The　bionic　impeller　inspired　by　the　long-eared　owl　with　better　performance　is　selected　for　the　experimental　research.　Compared　with　the　prototype,　the　weighted　flow　volume　of　the　air　conditioner　with　owl-inspired　bionic　impeller　is　increased　by　29.6　m3•h-1,　and　the　power　of　the　conditioner　is　reduced　by　3.5%　under　the　same　air　volume.　©　2022,　Editorial　Office　of　Journal　of　Xi＇an　Jiaotong　University.　All　right　reserved.