The invention provides a vibration reduction device. The device comprises a connection rod, a first telescopic rod, a suspension body with a preset weight and a connection body, wherein the connection body is used for connecting a power transmission line, a first end of the connection rod is rotatably connected with the connection body, a second end of the connection rod is connected with the suspension body, a first end of the first telescopic rod is rotatably connected with the connection body, and a second end of the first telescopic rod is rotatably connected with the connection rod. When the power transmission line swings, the connection body swings under the driving of the power transmission line, and the connection body can drive the connection rod, the first telescopic rod and the suspension body to swing; since the suspension body has a certain weight, the suspension body has an effect of preventing the power transmission line from swinging; and moreover, compared with an existing swinging-prevention mode for ice removal of the power transmission line, the vibration reduction device provided by the embodiment of the invention mainly comprises the connection rod and the first telescopic rod, and thus, the vibration reduction device is relatively simple in structure and relatively low in cost, and is easy to implement.