The invention discloses an arcing horn arc-extinguishing device, and belongs to the technical field of power transmission. The arcing horn arc-extinguishing device comprises an arc-extinguishing column arranged on a wire tower, a power supply and a controller. The arc-extinguishing column is provided with an arc-extinguishing cavity penetrating through the two ends of the arc-extinguishing column.The two ends of the arc-extinguishing cavity are respectively corresponding to contacts of a pair of arcing horns. The outer side of the arc-extinguishing column is provided with a plurality of outerarc-extinguishing grid sheets along the extending direction; and the inner side wall of the arc-extinguishing column is provided with a plurality of annular grooves in the extending direction of thearc-extinguishing column, wherein inner arc-extinguishing assemblies capable of cutting off the arc-extinguishing cavity are arranged in the annular grooves. A plurality of sensors are also arranged on the inner side wall of the arc-extinguishing column. The power supply is connected with the inner arc-extinguishing assemblies; and the controller is connected with the inner arc-extinguishing assemblies and the sensor. When the arcing horns generate arcs, the outer arc-extinguishing grid sheet can perform self-arc-extinguishing on the arcs outside the arc-extinguishing column, and the inner arc-extinguishing assembly can cut off the arc-extinguishing cavity into a plurality of cavities and extinguish the arcs in the cavities, so that the firing time of the insulator and the arcing horn contacts is shortened, and the service life of the insulator and the arcing horn contacts is prolonged.