The utility model discloses a transmission line foreign matter laser clearing device based on carbon dioxide laser, laser emission unit pass through electrical platform and connect on the box, are equipped with the cooling unit and the power that are used for cooling off laser emission unit in the box, laser emission unit includes carbon dioxide laser, beam collimation ware and visible light indicating units, aiming the unit and taking the photograph camera and wireless network bridge module including the focusing, camera and carbon dioxide laser emitting laser syntropy are taken the photograph in the focusing, image transmission to the controller that laser emission unit that camera gathered aimed the position is taken the photograph with the focusing to the wireless network bridge module, and the controller passes through wireless network with electrical platform and links to each other, and the controller is through showing that screen display shows that laser emission unit aims the image of position, bears laser emission unit according to command control electrical platform and rotates. The utility model discloses it is high to clear away the foreign matter rate of accuracy, does not need high altitude construction, convenient operation, live -working, low, little, the consuming time weak point of manpower and material resource of safe risk.