The invention discloses a line anti-vibration system capable of adjusting resonant frequencies, relates to a line anti-vibration system, and aims at solving the problem that the existing antivibrator only can be matched with several resonant frequencies and cannot be matched with multiple resonant frequencies. A line clip part of the line anti-vibration system disclosed by the invention is compressed tightly on a line sheath, which covers an overhead line, through a clip fastener; a middle support plate and a bottom support plate are connected with the line clip part through bolts from top to bottom in sequence; two ends of the middle support plate are respectively provided with a set of resonant devices; a rotating lever is rotatably arranged on the middle support plate through a center shaft; two ends of the rotating lever are respectively and rotatably connected with the other end of a connecting rod; the bottom part of the rotating lever is provided with gear teeth; a stepping motor is fixedly arranged on the bottom support plate; a screw is arranged on the bottom support plate and is connected with the output end of the stepping motor; a controller is arranged on the line sheath through a clip. The line anti-vibration system disclosed by the invention is used for power transmission towers.