The utility model provides a quartzy lens device with scrape and sweep mechanism, includes quartzy lens (1), scrapes and sweeps ware (2) and scrape and sweep controller (3). Scrape and sweep the wareand install on quartzy lens, scrape and sweep the controller and install the one end at quartzy lens, scrape and sweep about the ware both ends and install the running roller, but centre gripping andon lower frame horizontal migration on quartzy lens, scrape and sweep controller control and scrape and sweep the ware and scrape dust and smog on sweeping quartzy lens at horizontal direction reciprocating motion. The utility model discloses the scraping and sweep the ware of installation on quartzy lens in some easy temperature sections that produces " smog ", is scraped and is swept the ware and start by oneself, scrapes and sweeps smog on the quartzy lens, keeps quartzy lens clean, clear. Ensure that the formation of image of ash awl is high -visible, the tentation data is true, accurate reliable. The utility model is suitable for a coal ash fusibility's test.