Alternating-current (AC) de-icing method

The invention discloses an alternating-current (AC) de-icing method. In the method, a de-icing device comprising a body, a wiring pile head and wire reels is utilized; one side of the de-icing device is taken as a mains side of incoming lines and the other side of the de-icing device is taken as an output low-pressure side; coils of the output side are drawn out independently, drawing heads are accessed the pile head of the device, and multi-level voltage output are obtained by a certain connection mode; the wire reels are arranged at two sides of the device, input connecting leads are wound on one side of each wire reel and output connecting leads are wound on the other side of each wire reel; after the freeze generates, the tail ends of transmission lines are shortly connected; according to the length and requirement of the transmission lines, a proper wiring mode and a voltage output gear are selected, and then the head ends of the transmission lines are connected with the output low-pressure side of the de-icing device by transition of a single-core insulation cable; and the transmission lines generate heat by the output AC so as to reach the de-icing effect. The invention has the advantages that the de-icing speed is quick, the influences on users are slight, the de-icing cost is low and the human injuries do not happen, the device is small, the weight is light, the operation is simple, the running is convenient and the device capacity is unchanged.