Ink scraping device

The invention provides an ink scraping device which is simple in structure, convenient to operate and capable of improving the ink scraping reliability. The ink scraping device comprises an ink disc, a roller wheel and a scraping knife. The ink disc is used for containing ink. The lower portion of the roller wheel is soaked in the ink in the ink disc. The scraping knife is arranged on the ink disc and located on one side of the roller wheel. The ink scraping device further comprises a heater, a controller, an imaging mechanism and an ink jet mechanism. By arranging the heater, the roller wheel is subjected to initial set through the heater, and then the ink scraping action is conducted through the scraping knife; when the protruding ink is scraped through the scraping knife, the ink connected with the protruding ink can be taken away by the scraping knife, and a recessed part is generated on the roller wheel; and acquisition is conducted through imaging, ink jet is conducted on the recessed part by controllin