The invention discloses preparation of a baking finish for a paint-drying bucket and a spraying method. According to the components and the ratio of ingredients of a primer and a pearlescent lacquer, the baking finish has an excellent surface effect and high temperature resistance. A fire retardant and epoxy resin can also be added to the ingredients, so that flame retardant and corrosion prevention effects can be achieved while the high temperature resistance is achieved; and the performance of the baking finish is improved. After the addition of pearl powder, a waterborne silver directional promoter is added, thereby promoting the parallel arrangement of the pearl powder on the paint surface and ensuring the surface smoothness of the baking finish. The waterborne resin is acrylic acid-modified polyester resin, so that the prepared baking finish is high in fullness and glossiness. The baking finish prepared by the preparation method and the spraying method has excellent performance; the sprayed product has high-temperature resistance, flame retardant and corrosion prevention effects, and is great in market potential and wide in prospect.