Scaffold cross bar

The utility model relates to the technical field of scaffolds for buildings, in particular to a scaffold cross rod which comprises stand column buckling discs and welding holes, the welding holes are formed in the middles of the stand column buckling discs, positioning inserting holes are formed in the upper half portions of the stand column buckling discs, and the stand column buckling discs are welded to stand columns through the welding holes. The front end and the rear end of the stand column are welded to the first limiting block, the left end and the right end of the stand column are welded to the second limiting block, and the outer side of the first limiting block is clamped to the first transverse rod connector through a first limiting groove. The first limiting grooves and the second limiting grooves can be clamped with the first limiting blocks and the second limiting blocks respectively, the positioning plug pins are clamped with the positioning insertion holes, the two cross rod connectors can be