Coating spraying device for filter material, filter material and dust removal filter bag

The utility model relates to the technical field of spraying equipment, in particular to a coating spraying device for a filter material, the filter material and a dust removal filter bag, and the coating spraying device comprises a base, a spraying box, a first tension roller, a second tension roller and a conveying assembly, the device further comprises a scraper; the scraping plate is located between the first tension roller and the second tension roller and located on the front side of the spraying box in the filter material conveying direction; the distance between the scraping plate and the filter material to be sprayed is the same as the thickness of the coating; and a guide surface for guiding the scraped coating to move towards the edge part of the scraper is arranged on the scraper. According to the coating spraying device for the filter material, after being sprayed, the coating can be scraped to be flat, so that the uniformity of the thickness of the coating is ensured; and more importantly, the s