The invention provides a fusion welding workbench for outdoor cables. The fusion welding workbench comprises a working table, wherein a cable fixing device, a cable joint box fixing device, a plurality of fiber core distinguishing devices, a fusion welding machine and a plurality of tool tables are successively arranged on the working table. Because the technical scheme of the fusion welding workbench disclosed by the invention is adopted, the fusion welding workbench is convenient to carry, cables can be firmly fixed, simultaneous working of multiple workers is realized, the fusion welding efficiency and quality are improved, the total consumed time can be shortened within 55 minutes, optical fibers do not need to be manually bent, cables are not easy to damage, and the working efficiency is high.