The invention provides a vacuum deduster with protective paint and solves the technical problems of incapability of realizing expected dedusting effect and short service life caused by that dust cannot be adsorbed on a dust bag and particles may be divided under colliding to follow air in the dust to reflow into outside air in the prior art. The vacuum deduster comprises a base, an engine body with a cavity inside is fixed on the base, a cover is hinged on the upper portion of the engine body, a dust suction port is arranged on the base, a dust scraping mechanism capable of helping dust waste on the ground to be sucked into the cavity of the engine body is arranged in the dust suction port, an absorbing mechanism capable of absorbing the dust waste on the ground into the cavity of the engine body is arranged between the dust suction port and the engine body, and the protective paint is sprayed outside the engine body through spraying equipment. The vacuum deduster has the advantage of long service life.