Overhead line foreign matter removing device and foreign matter removing method

The invention discloses an overhead line foreign matter removing device and a foreign matter removing method. The overhead line foreign matter removing device comprises a main controller, a servo turntable, and a visual positioning device, a laser emitting device and an ultrasonic sensor arranged on the servo turntable, wherein the main controller is respectively connected with the ultrasonic sensor, the visual positioning device and the laser emitting device; the visual positioning device is used for positioning the position of a foreign matter on the overhead line; the ultrasonic sensor is used for detecting the spacing distance between the removing device and the foreign matter on the transmission line; and the main controller is used for setting the laser emitting power of the laser emitting device according to the spacing distance. By setting the laser, the camera and the ultrasonic sensor and the positional relationship between them, the accurate control of the direction of laseremission and the control