Subway operation line base long steel rail welding platform device

The utility model relates to the technical field of rail engineering, in particular to a subway operation line base long steel rail welding platform device which comprises a welding working area, a welding platform and a welding platform, the roll shaft structures extend from the welding working area to the parallel direction of the existing line, each roll shaft structure comprises a supporting frame and a roll shaft assembly arranged on the supporting frame, and the supporting frames are used for supporting the roll shaft assemblies to the same height of the existing line. Compared with the prior art, the combined structure is simple and feasible, is easy to mount and dismount, and has the advantages that the normal operation of a subway line can be maintained, the travel of passengers is not influenced, the subway operation safety is ensured, a long steel rail welding platform is constructed by utilizing an original subway operation line vehicle base, and a 25m steel rail is welded into a 100m long steel r