The present invention relates to a multiaxial transfer type welding apparatus, which is a submerged arc welding (SAW)-only transfer type welding apparatus fixing a weldment, i.e., a specimen, on a shelf and advancing welding in the specimen. According to the present invention, the apparatus has a structure including a movable portable shelf to fix a specimen and a welding apparatus; adds an additional structure to the movable portable shelf so as to advance a welding work as a heavy specimen is efficiently transferred; and provides a configuration capable of enhancing work efficiency. In particular, a structure including a rail formed on a lower part of a weldment transfer device to be able to move in a predetermined direction is provided, thus providing effects capable of simplifying manufacturing due to simplicity of the structure, reducing a risk generated when a worker personally changes a position of a heavy specimen, preventing increase of a work moving line due to a small occupation space, and enhancing work efficiency.
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