Abstract: The numerical simulation of a wing with glaze ice, mixed ice and rime ice was carried out by FLUENT. The effect of dual synthetic jet on flow separation for iced airfoils was analyzed. The results show that these three ice shapes change the streamline of the wing, and the aerodynamic characteristics of the wing are affected to different degrees. The effect of rime ice on aerodynamic characteristics of the wing is the least, and the effect of glaze ice is the largest. Because of the synthetic jet actuator, the aerodynamic characteristics of iced airfoils are improved effectively at small angle of attack. At high angle of attack, the actuator can not inhibit flow separation for iced airfoils completely. But it can effectively delay the separation vortex.