Rectangular steel pipe surface depression correcting device

The utility model relates to the technical field of steel structure manufacturing, and discloses a rectangular steel pipe surface depression correcting device which comprises a counter-force assembly, a first connecting piece, a second connecting piece and a third connecting piece. Any tension bearing assembly comprises a tension bearing piece and/or a drawing piece, one end of the tension bearing piece is correspondingly installed at the installation position, the other end of the tension bearing piece extends in the direction away from the counter-force assembly, and an installation space is formed between the at least two tension bearing assemblies; the drawing piece is detachably installed at the end, away from the counter-force assembly, of the tension bearing piece, and a connecting end matched with the concave area and fixed to the concave area in a welded mode is machined. The at least one force bearing assembly is mounted in the mounting space and is suitable for being arranged above the concave area