Abstract:When flying in the conditions of icing,aircraft is more probably to arise the phenomena of icing.Once the aircraft iced up,There exists hidden dangers to the safety of the plane.So reducing the harm caused by it that becomes an important research topic.Based on FENSAP-ICE,I will beign the numerical simulation of wings through Improving thermodynamic model of Messinger icing ,which simulates more realistic flight conditions. To analyse changes of aerodynamic characteristics of wings before and after aircraft icing under the different flight conditions,Therefore verity the feasibility of the way through the C3D of FENSAP-ICE.The result indicates that environment temperature will affect the type and thickness of wing icing. the wings iced up,which caused the decrease of lift cofficient and the increase of drag cofficient and affected the areodynamic characteriseics of aircarft seriously.It is obvious that the electrothermal anti-icing system which designed not only can effectively prevent icing on the surface of the wing,but also can deice periodically.