The utility model relates to fully-insulating wire nippers and belongs to the technical field of hand tools. A wear-resistant plastic back shell is adhered to the back of a jaw of the nippers; plastic sleeves are sleeved on handles; and the nipper body between the jaw and the two handles is surrounded by high-elastic rubber serving as a skirt sleeve. When an electric wire is disconnected, personal safety is enhanced, and an adjacent device is not shorted out by the nippers. The fully-insulating wire nippers are applied to operation such as wire disconnection under the condition of electrification and the like in electric power engineering and the like.