The invention relates to a power transmission line deicing device propelled along a spiral trajectory, and belongs to the field of power transmission line deicing and maintenance equipment, and the driving device body is driven by a drill bit and a driving mechanism to be inserted into the ice coating layer, an ice layer is broken by the aid of a blasting body dragged on the rear side of the device body, and the deicing effect is guaranteed. The spiral device body is wound on the power transmission line, so that the running track is spiral, the device is simple in structure, the drill bit andthe driving mechanism in the device are mechanically driven, damage caused by explosion due to an electrical element is avoided, and the safety and stability of equipment are guaranteed.