As new building material, aluminium&zinc-silicate coated sheet plate, based upon the cold-rolled steel belt is produced through continuous zinc hot coated technical process by using 55% aluminium, 43.5% zinc and 1.5%***** coating layer is Zn-Ai ***** to the good feature of corrosion resistance, the aluminius of zinc coated sheet plate is 2 to 6 times as high as zinc coated sheet plate in terms of air corrosion resistance with the same coating ***** the features of fine coating and processing ability, the product is widely used in the industries of building materials, electric appliance auto and house hold appliance, etc.