The invention discloses a
welding method of a
deck structure of a stainless steel compound plate of a railway steel bridge, which comprises the following steps: selecting structural steel for a bridge with thickness of 16-20mm as a base layer, selecting
austenitic stainless steel with thickness of 2-4mm as a
multiple layer, and removing 3-6mm of cladding material materials at each of two edges of
welding grooves in advance, wherein the groove angle is 45-65 degrees, and the groove spacing is 4-8mm; the method comprises the following steps: firstly, assembling positioned
welding, and then, carrying out backing welding by CO2 gas shielded welding; then, carrying out welding of the base layer by submerged-
arc welding; and finally, carrying out welding of a
transition layer and the
multiple layer by the CO2 gas shielded welding. By adopting a specific groove type, the invention eliminates uncertain human factors and solves the problems that the thickness of the deposited
metal of the base layer is insufficient, the
multiple layer can be molten by mistake when the substrate layer is welded, and the like; the reverse formation is good, so that the reverse back gouging process is omitted; and the invention has the advantages of good
assembly quality and easy realization of
mechanization and
automation, improves the production efficiency, and is convenient for ensuring the
corrosion resistance of the multiple layer.