The utility model discloses a damper restorer. The damper restorer comprises a linear bearing and two clamping pieces, the linear bearing comprises two bearing lobe bodies buckled on an overhead line, each clamping piece comprises a semicircular tile sleeve, a first side plate extending from one side edge of the tile sleeve, and a second side plate extending from the other side edge of the tile sleeve, the two tile sleeves can form a sleeve body for clamping the two bearing lobe bodies, and the two first side plates are provided with hanging holes. The contact areas between balls of the two bearing lobe bodies and the circumference of the overhead line are small, and the contact resistance is very small. Under the effect of a dragging force, the damper restorer can generate a high speed in a short time, and the momentum is large during impact so that a damper can be reset at a high speed. Besides, the balls of the two bearing lobe bodies are contacted with the overhead line in the circumferential direction of the overhead line, under the effect of the non-uniform dragging force, the damper restorer does not bounce relative to the overhead line so that the resetting movement of the damper is smooth.