Steel structure large-span adjustable floor support plate supporting structure

The utility model relates to the technical field of plate supporting structures, in particular to a steel structure large-span adjustable floor support plate supporting structure which comprises a supporting frame, a connecting plate is welded to the top face of the supporting frame, and a first top plate and a second top plate are welded to the top face of the connecting plate respectively. The top faces of the first top plate and the second top plate are slidably connected with a third top plate and a fourth top plate through a first sliding rail and a second sliding rail correspondingly, and a first fixing mechanism and a second fixing mechanism are arranged at the two ends of the rear end of the connecting plate correspondingly. According to the supporting structure, the first top plate, the second top plate, the third top plate, the fourth top plate, the first sliding rail and the second sliding rail are arranged, so that the supporting structure can achieve large-span supporting, a product can be effect