The invention discloses a device for removing foreign matters by virtue of lasers. The device comprises a main machine, a laser transmitter, a tripod and a handheld controller, wherein an electrical platform is arranged on the tripod, the laser transmitter is detachably connected with the electrical platform, a holographic sighting telescope is arranged on the laser transmitter, the main machine comprises a box body, the box body is internally provided with a controller, a power supply module and a first wireless communication module, the handheld controller comprises a microprocessor, a display screen, a second wireless communication module and a plurality of keys, the controller is respectively electrically connected with the power supply module, the laser transmitter, the electrical platform, the holographic sighting telescope and the first wireless communication module, the laser transmitter is electrically connected with the power supply module, the microprocessor is respectivelyelectrically connected with the display screen, the second wireless communication module and the keys, and the first wireless communication module can perform wireless communication with the second wireless communication module. The device disclosed by the invention can emit controllable lasers from ground and perform remote cutting removal on the foreign matters at high altitude, and a charged, remote and non-contact operation is realized.