The invention puts forward an automatic-unloading vertical centrifuge. A scraping device comprises a scraper shaft, a scraper base, a scraper, a driving gear, a driven gear, and a first drive device, wherein a controller is connected to the first drive device, the first drive device is connected to the driving gear to drive rotation of the driving gear, the driven gear is engaged with the driving gear, one end of the scraper shaft passes through the driven gear and is connected to the driven gear by threads, the other end of the scraper shaft passes through a machine cover and is stretched into a drum and connected with the scraper base, and the scraper is installed on the scraper base; and a first air duct is disposed inside the scraper shaft, a second air duct is disposed inside the scraper base, the first air duct is communicated with the second air duct, blowing nozzles which blow wind to the inner wall of the drum are disposed on two sides of the scraper on the scraper base, and the blowing nozzles are communicated with the second air duct. The automatic-unloading vertical centrifuge provided by the invention can realize lifting, descending and rotation of the scraper shaft by the drive device, the driving gear and the driven gear.