The invention discloses a dust removal device which comprises rotating shafts, a dust prevention track, a brush and a fan, wherein the rotating shafts are respectively arranged at the two ends of the dust prevention track and rotate to drive the dust prevention track to move; the brush is arranged on one side of the dust prevention track and can be in contact with the surface of the dust prevention track; the fan and the brush are relatively arranged; when the dust prevention track rotates, dust on the surface of the dust prevention track is brushed up by the brush and the fan blows the dust out. A projector adopts the dust removal device, when the dust prevention track rotates, dust on the dust prevention track is brushed away by the brush, so that the purpose of dust removal is realized. The dust removal device is convenient to use by a user, and the maintenance cost of the projector is reduced. The invention further provides the projector.