Production method for continuously hot-dip galvanizing, aluminum and magnesium on basis of ESP hot-rolled coil plate

The invention belongs to the technical field of hot dipping, and provides a production method for continuous hot galvanizing of zinc, aluminum and magnesium based on an ESP hot-rolled coil plate, which comprises the following steps: A, casting molten steel by an ESP thin slab continuous casting machine to obtain a continuous casting slab, carrying out rough rolling to obtain an intermediate plate, heating the intermediate plate, and carrying out finish rolling and curling to obtain the hot-rolled coil plate; b, the hot-rolled coiled plate is subjected to phosphorus breaking, acid pickling and flattening, and an acid-pickled plate is obtained; c, the pickled plate enters a furnace area to be heated and annealed and then is immersed in a plating solution, and a zinc-aluminum-magnesium coiled plate is obtained; and D, the zinc-aluminum-magnesium rolled plate is subjected to air knife purging, cooling after plating, finishing, withdrawal and straightening, passivation and curling, and a product is obtained. Accor