Welding method for PCTC ship carrying deck stand column

The invention relates to the technical field of ship manufacturing, in particular to a PCTC ship carrying deck stand column welding method which comprises the following steps that S1, a slope opening is machined in the upper end face of a supporting stand column; s2, the supporting stand columns are moved to the installation positions, and elevation welding seams are formed between the supporting stand columns and the upper deck; s3, the supporting stand column is fixed through a positioning code plate, one end of the positioning code plate is welded to the upper deck, and the other end of the positioning code plate is welded to the end, with the narrow elevation welding seam, of the supporting stand column; s4, a welding backing is arranged between the positioning code plate and the supporting stand column, and the welding backing is right opposite to the narrow side of the elevation welding seam; s5, welding is conducted in the extension direction of the elevation welding seam in a pneumoelectric elevation