Abstract: In order to solve the problem that the traditional tools and methods can not meet the requirement of clearing foreign object debris economically, efficiently and safely, the method of clearing foreign object debris on overhead power lines with land-based directed energy laser remotely was proposed. Theoretical analysis, finite element simulation and experimental verification were carried out. Based on the above research, the apparatus for removing foreign bodies from overhead lines by laser was developed, tested and applied in engineering practice. The result shows that the appropriate minimum power density is 20W/cm², and the laser irradiation of 20W/cm² is unable to damage the wire. The laser removal apparatus can remove foreign bodies on overhead lines under live working conditions efficiently and safely at long distance.