To further clarify the impact of aerodynamic coupling characteristics on the galloping amplitude of crescent-shaped iced single conductor, an analysis model of wind-induced vibration response of crescent-shaped iced single conductor is established based on aerodynamic theory. The fluid-solid coupling method is used to calculate the displacement time history of the crescent-shaped iced single conductor, and the influence of aerodynamic coupling characteristics on the galloping amplitude of the crescent-shaped iced single conductor is analyzed. The results show that the frequency ratio and the degree of freedom have little influence on the aerodynamic lift-drag coefficient of the crescent-shaped iced single conductor, which shows that the aerodynamic force on the crescent-shaped iced single conductor in the flow field does not change with the different degrees of freedom and frequency ratio. In different degrees of freedom systems, the crescent-shaped ice-covered single conductor gallops greatly at the angle of attack of 20°. In the vertical single-degree-of-freedom system, the galloping amplitude of crescent-shaped ice-covered single conductor is greatly influenced by the natural frequency, and the larger the natural frequency, the smaller the galloping amplitude. In the vertical-horizontal free system, when the vertical frequency is equal to the horizontal frequency, the crescent-shaped ice-covered single conductor is coupled to vibrate, and the galloping amplitude of the crescent-shaped ice-covered single conductor in the vertical direction is greater than that in other frequencies. When the crescent-shaped ice-covered single conductor gallops in the flow field, its horizontal movement promotes vertical vibration, and the trajectory of the crescent-shaped ice-covered single conductor in the flow field is long. The research results further clarify the influence of aerodynamic coupling characteristics on the galloping of crescent-shaped iced single conductors, which can provide some theoretical reference for the study of galloping and dancing prevention of crescent-shaped iced single conductors in engineering.