Bridge deck slab steel bar welding robot

The invention relates to the technical field of bridge deck slab connecting and machining, in particular to a bridge deck slab steel bar welding robot which comprises a U-shaped base, moving wheels, a mounting plate, a limiting mechanism and a welding unit. Two clamping plates arranged in the limiting mechanism are driven by a first driving set to clamp the two corresponding steel bars, so that the two steel bars are tightly attached in the front-back direction, and the phenomenon that welding connection cannot be conducted or the welding strength is low due to the fact that the welding parts of the two steel bars are not tightly attached is avoided. Secondly, the non-welding sections of the corresponding steel bars are pressed on a bearing plate through lower pressing blocks, so that the two adjacent steel bars are aligned in the vertical direction, and the phenomenon that the two steel bars are not in tight contact at the welding positions due to the fact that the two steel bars are staggered in the vertica