The utility model relates to a large length optical fiber cabling rack, in particularly to an optical fiber cabling rack for a laser welding stainless steel pipe optical fiber unit. The utility model having a fiber cabling pedestal gear structure is characterized in that the two laterals of the fiber cabling pedestal gear is provided with a plurality of single drum fiber cabling drums, the adjacent position of which is provided with a fiber guiding sliding bar. The single drum fiber cabling drums devices are arranged on the shaft of an optical fiber drum and the optical fiber shaft device is arranged on a double supports bearing. The shaft terminal of the optical fiber drum is provided with an adjustable extension controller which adopts a magnetic damper. The fiber cabling pedestal gear is provided with an optical fiber cabling buffering wheel group.