The invention discloses a foam dust removal device and relates to the technical field of environmental friendliness. The foam dust removal device comprises a machine shell, a foaming spray nozzle, a liquid storing tank, a pipeline quantitative distributor and a high-pressure hose. A dust suction guiding cylinder and a dust adsorption net are sequentially arranged between the pipeline quantitative distributor and the foaming spray nozzle. Air inlets are formed in the other end, relative to the end close to the dust adsorption net, of the dust suction guiding cylinder. Motors and fans are sequentially mounted in the dust suction guiding cylinder towards the dust adsorption net. Through the foam dust removal device, dust-containing foam near the dust adsorption net can be suctioned and adhered to the dust adsorption net and thus cannot fall down, so that the problems that lots of dust-containing foam is distributed in air, an existing foam dust removal device only can prevent dust from spreading, and dust removal is not thorough are solved.