The objective of the invention is to provide a pre-twisted wire type damper used in high altitude areas which can be used to effectively reduce the corona audible noise and the corona loss of a 330kV high altitude area electric transmission line, and can be used to improve the damping performance compared with a conventional dog bone type damper having different two-side damper head sphere sizes. The damper comprises a damper head, a steel strand, a pre-twisted wire and a wire clamp which is pressed and fixed on the steel strand. The damper head has a dog bone type structure, and two ends of the damper head are symmetrical spheres having same sizes. The steel strand is fixed on the damper head in the cold pressing riveting manner. According to the damper of the invention, by optimizing the damper head structure size design, the surface curvature radius of the damper head can be determined reasonably, and the anti-corona performance can be effectively improved while ensuring the advantage of good damping performance, so that the corona noise and the corona loss of the high altitude area 330kV electric transmission line damper can be reduced.