Abstract: Traditional anti dancing devices for overhead transmission and distribution lines rely heavily on additional power and are affected by various factors such as environmental conditions, equipment quality, and construction quality. Their anti dancing effect is limited and cannot effectively suppress the amplitude of the line and the amplitude of the line dancing. Therefore, a research on anti vibration device for overhead transmission and distribution lines based on self gravity has been proposed. Firstly, design the overall structure of the device and construct a symmetrical structure on both sides. Design a fixed clamp assembly consisting of upper and lower clamps to secure the device to the overhead wire, ensuring a tight fit between the device and the overhead cable. Design anti sway components based on self gravity, where horizontal anti sway components enhance stability using central axis, bearings, and other components, and vertical anti sway components utilize springs, lead weights, directional guide rods, etc. to achieve anti sway function using self weight. Experiments have shown that after installing the anti vibration device, the amplitude of the transmission line decreases rapidly as the wind speed and ice thickness gradually increase. The maximum vibration amplitude does not exceed 0.50 m, which can effectively suppress conductor vibration, ensure the stability of the transmission line, and provide a reliable solution for the safe operation of overhead transmission and distribution lines.