Production method of welded color-coated sheet

The invention relates to a production method of a welded color-coated sheet. The hardness of the polyurethane adhesive layer of the coating roller is improved from Shore 55-60 to 60-65, so that the change of the diameter surface of the coating roller caused by the extrusion force effect of the adhesive layer is reduced; the roller speed ratio of an opposite coating roller is 110% +/-10% of the process speed, the roller speed ratio of a middle strip roller is 150% +/-10% of the process speed, the roller speed ratio of a metering roller is 5%-10% of the process speed, and the diameter phi of the coating roller is controlled to be 250-260 mm; the surface of the strip roller is subjected to laser texturing treatment after chromium plating, and the surface Ra roughness is 0.6-0.8 [mu] m; and the roller speed ratio, the roller surface diameter, the rubber layer hardness, the roller surface roughness and the pressure between the rollers are more stable, so that the product quality is more stable. 本发明涉及一种焊接彩涂板生产方法。通过