The utility model provides a problem that extra -high voltage damper mainly solves original wire and will produce disconnected strand, broken string under the vibration stress. The utility model provides an extra -high voltage damper, this damper includes steel hoist cable, fastener, tup, sleeve pipe, the fastener includes the round pin axle, the fastener gland, and the fastener main part, the bolt, the nut, the plain washer, spring washer and rubber pad, be equipped with protruding A on the wire casing of fastener gland, be equipped with protruding B on the wire casing of fastener main part, fastener main part lower extreme is equipped with the hole, be equipped with the bell mouth on the tup. The utility model discloses a damper can restrain effectively that little wind vibration of wire moves among the overhead transmission line, has realized the requirement of the anticorona performance of big cross -section cable mounting and extra -high voltage gold utensil self, has that novel structure uniqueness, working property are reliable and stable, rapid operation simple accurate, considerable, the convenient transportation of benefit, is fit for the trade and the advantage such as widelys popularize.