The invention discloses a combined welding rod storage box and belongs to the technical field of welding rod storage. The combined welding rod storage box is technically characterized by comprising a support, wherein a supporting shaft is fixed to the support, a box body is arranged on the supporting shaft, a plurality of storage lattices are distributed in the box body in the circumferential direction of the supporting shaft, a plurality of bearing bars are distributed in the storage lattices in the axial direction of the supporting shaft, operating holes are formed in the side walls, corresponding to the storage lattices, of the box body, and sealing covers are arranged at the operating holes; a supporting sleeve matched with the supporting shaft is arranged in the box body, the supporting sleeve is provided with feed grooves which are communicated with the storage lattices in a one-to-one corresponding mode, the supporting shaft is provided with discharge grooves corresponding to the feed grooves, a stop mechanism is arranged at the position, close to the ends, of the open portions of the discharge grooves, and the depth of the discharge groove located at the bottom of the stop mechanism is matched with the outer diameter of a single welding rod to be stored; one end of each discharge groove is provided with a welding rod push-out mechanism. The combined welding rod storage box is reasonable in structure, convenient to use and good in effect, and is used for storing welding rods.