Scraper conveyor is one of the most widely used equipment in coal mines and one of the most worn and damaged equipment. Laser cladding technology is used to clad a layer of laser strengthening coating with metallurgical bonding, hard point and high toughness metal material composite in the easily worn part of the middle groove, which greatly improves its average service life. This meets the technical requirements of equipment re-manufacturing and realizes the recycling of the middle groove.