The utility model discloses a bury chain scraper for scraper conveyor, a serial communication port, chain scraper includes the unequal scraper blade of a plurality of length to longer scraper blade is again including scraper blade and the two kinds slope scraper blades of standing vertically. Longer scraper blade and short scraper blade arrange evenly that upright the scraper blade is also evenly arranged with the slope scraper blade. The utility model discloses under the prerequisite of guaranteeing scraper flight material volume, the dead weight that lightens chain scraper as far as possible reduces the chain both ends to rub and wear and tear scraping cutting to pieces of trigger box, evenly arranges and has also avoided the chain scraper off tracking, upright combination of flight link slope simultaneously, upright the scraper blade can increase the area material volume of chain, and the slope scraper blade can be scraped the long -pending material on the bottom plate totally, avoids the scraper chain to block up. Upright the scraper blade is being close to the round pin axle chain link equal radius angle in one side to increase the clearance of scraper blade and chain link, assurance operation process does not have to cut to pieces and rubs.