The utility model provides a high pressure overhead line protection of laser hazard net, but including supporting guide lifting support, laser watch -dog, supporting guide includes support frame, track, slider, but lifting support is including supporting a section of thick bamboo, lead screw mechanism, power transport mechanism, the laser watch -dog includes box, laser range finder, PLC, alarm, support a section of thick bamboo set up in on the slider, the lead screw establishment of institution in support in the section of thick bamboo, the box set up in on the nut of lead screw mechanism, laser range finder set up in on the outer wall of box. Go upward away drive laser watch -dog through the slider at the track and move on the horizontal direction, but through lifting support control laser watch -dog in directly square rebound of heavily fortified point, whether have suspicious object to get into in surveying security range through laser range finder, if there is then PLC control alarm report to the police.