Large storage tank ceramic backing welding construction method

The invention provides a large storage tank ceramic backing welding construction method, and relates to the technical field of welding. The method comprises the following steps: preparation before welding, wherein impurities on the surface of a workpiece are removed, and comprise one or the combination of oil stains, metal filings and an oxidation film; backing pasting, wherein specifically ceramic backings are tightly installed on the workpiece in an attached mode, and the ceramic backings are mutually and tightly pushed to be connected in an inclined mode; and welding, wherein specifically, the workpiece is welded through argon arc single-surface welding and priming layer welding. According to the method, a ceramic backing is used as a lining support, so that a welding seam is forcibly formed, back gouging, overhead welding and operation in a narrow and closed environment are avoided, the labor intensity of a welder is relieved, and the welding quality is improved; a welding wire is used as an electrode for