The invention discloses a scraping device with scrapers on scraping blades. The scraping device comprises a cross beam, inclined wedges, driving assemblies, scraping blade bases, the scraping blades,the scrapers, sliding rods, sliding sleeves and springs, wherein the inclined wedges and the driving assemblies are arranged on the cross beam, the tops of the scraping blade bases are connected withthe driving assemblies, the bottoms of the scraping bases are connected with the scraping blades, the scrapers abut against the slopes of the bottoms of the scraping blades, the scrapers are connectedwith the bottoms of the sliding rods, the tops of the sliding rods sequentially penetrate through the scraping blades and the sliding sleeves to abut against the bottom faces of the inclined wedges,and the springs sleeve the sliding rods and are located between the sliding sleeves and the inclined wedges. According to the scraping device, the scrapers in the device can scrape off composite materials adhering to the scraping blades, so that the scraping effect of the scraping blades is ensured, the automatic operation of a machine is ensured, and the situation that the machine is paused to clear materials adhering to scraping blades in the production process is avoided. After the scraping device with the scrapers on the scraping blades is adopted on the machine, the problem that production is affected due to the fact that the materials adhere to the scraping blades can be solved, the production efficiency is improved, and meanwhile the labor intensity of workers is relieved.