The utility model relates to a power transmission line laser bird repellent device, including central processing unit central processing unit, solar cell panel, rechargeable battery, voltage stabilizing circuit, photosensitive sensor, laser instrument, timer, display module, the living ware of frequency flash and acousto -optic warning module, solar cell panel and rechargeable battery's input links to each other, and electric protection device and voltage stabilizing circuit are prevented recoiling by rechargeable battery's output through charging input links to each other, voltage stabilizing circuit's output links to each other with central processing unit's input, timer, photosensitive sensor's output links to each other with central processing unit's input, the input of display module, the living ware of frequency flash and acousto -optic warning module is continuous with central processing unit's output respectively. The utility model discloses circuit structure is simple, with low costs, long service life, drives the bird and effectual and can avoid the birds injures and deaths.