The utility model relates to a dedusting type vibrating screen, in particular to a special dedusting device for a vibrating screen, which belongs to the technical field of environmentally-friendly dry dedusting. A vibrating screen surface of the vibrating screen of the dedusting device is arranged in a sealing cavity; the upper part of the sealing cavity is connected with a primary dust filer; the whole vibrating screen, a discharge hole of the vibrating screen and an ash hopper under the screen are sealed in a secondary dedusting seal box; the upper part of the secondary dedusting seal box is connected with a secondary dust filter through a pipe; and bag-type dust removers are arranged in the first dust filter and the secondary dust filter. With the adoption of the dedusting type vibrating screen, the collecting and the conveying of the dust of the vibrating screen can be solved, the collecting rate can reach 95 percent, the treatment cost is low, the investment is low, the floor area is small, the dust remover has long service life, the construction period is short, and gas discharged from the outlet of the dust remover is less than the national discharge standard.