Pneumatic self-service dispensing device for whole-box filling box-packed welding wires

The invention discloses a pneumatic self-service dispensing device for whole-box filling box-packed welding wires. The pneumatic self-service dispensing device comprises a dispensing device box, and a lifting mechanism used for controlling to-be-dispensed welding wire reels to ascend and descend is arranged in the dispensing device box; the lifting mechanism comprises a fixing plate fixed to the inner bottom wall of the dispensing device box, a horizontal lifting platform arranged on the fixing plate, a supporting assembly arranged on the fixing plate and used for supporting the horizontal lifting platform and sliding blocks arranged on the fixing plate, and a sliding groove is formed in the upper surface of the fixing plate; the two sliding blocks are arranged at the two ends of the sliding groove in a sliding mode correspondingly, and the upper surfaces of the two sliding blocks are fixed to the bottom faces of two supporting rods located at the lower end of the horizontal lifting platform correspondingly;