The embossed Galvanized steel phenolic air duct sheet is a new generation evolution product of traditional iron sheet air duct. The outer layer of the air duct board is made of galvanized embossed steel plate, the inner layer is coated with anticorrosive aluminum foil, and the middle is composited with phenolic foam. In addition to the advantages of traditional iron sheet air ducts of good rigidity and high strength, it also has the properties of flame retardant heat preservation, sound absorption and noise reduction. Moreover, after the pipe is formed, no secondary heat preservation is required, which overcomes the weakness of the traditional iron sheet air duct that the outer heat preservation layer is easily damaged, has a longer service life, and is beautiful and generous.