Galloping of iced conductors under skew winds is always controlling condition. The aerodynamic parameters of iced conductors under skew winds is the key factor of galloping. This paper studies aerodynamic characteristics of crescent iced conductors under skew winds. Under skew winds aerodynamic coefficients of iced conductors carries on the examination on the traditional oblique wind decomposition method.using computational fluid dynamics software FLUENT numerical simulation and wind tunnel test on two kinds of methods, the iced conductor in under skew wind aerodynamic characteristics are studied, the wind tunnel test measured data and numerical simulation results a comparison is drawn, numerical simulation and experimental results are in good agreement.