The invention aims to overcome the defects in the prior art and provides a device for remotely monitoring the switch on-off state of a high voltage line isolation switch on the basis of the laser induction technology, and the purposes of reliably monitoring the state of the isolation switch and remotely, automatically and accurately determining the state of the isolation switch are achieved. To achieve the purposes, the device for remotely monitoring the switch on-off state of the high voltage isolation switch comprises an isolation switch on-off state laser induction module installed in the position of the isolation switch, a power line carrier broadband communication module and a rear-end server, wherein the isolation switch on-off state laser induction module is composed of a laser transmitter, a laser reflector and a laser inductor. The device for remotely monitoring the switch on-off state of the high voltage isolation switch has the advantages that through the laser induction technology, when a switch arm is located in a specific position, laser beams transmitted by the laser transmitter are reflected to the photosensitive surface of the laser inductor, and thus the switch on-off state of the isolation switch can be judged.