The utility model belongs to the technical field of power equipment, specifically relate to a device for bird is prevented in transmission line special use, including the concrete pole, be equipped with the power transmission line on the said concrete pole, the interval is equipped with the insulator on the power transmission line, the top of said insulator is equipped with the protection umbrella, and the surface of protection umbrella is equipped with circular arch, lies in on the power transmission line to be equipped with between concrete pole and the insulator and drives the bird windmill, and driving the bird windmill, to pass through U type link fixed with the power transmission line, and U type link is connected with the pivot, and the pivot is connected with four flabellums, is equipped with the through-hole on the flabellum, is close to the concrete pole position department of putting on the power transmission line and is equipped with the arc and prevents the bird case, and the arc prevents that the bird case passes through U type link and fixes with the power transmission line, and U type link has linked firmly prevents the bird cambered surface, prevents that the surface of bird cambered surface is equipped with the smoothing agent coating, and the top of concrete pole is equipped with vocal ware the utility model has the advantages of prevent that the bird resultant effect is good.