Descaling device for geothermal well

The utility model discloses a descaling device used for a geothermal well, the descaling device comprises a wall scraper, a centralizer and a sliding sleeve switch, the wall scraper is used for extending into a sleeve to be descaled, the wall scraper comprises a wall scraper body and a scraper body, the scraper body is arranged on the side wall of the wall scraper body, and the sliding sleeve switch is arranged on the side wall of the wall scraper body. The scraper body is provided with a hidden position contained in the wall scraper body and a working position extending out of the surface of the wall scraper body, and the scraper body can move between the hidden position and the working position. By arranging the wall scraper, scale bonded on the inner wall of the geothermal well sleeve can be removed, normal operation of the geothermal well is maintained, and the service life of the geothermal well is prolonged. In the well descending process of the descaling device, the scraper body is located at the hidde