The invention discloses a grouping trolley of a full-automatic profile steel stacking machine. The full-automatic profile steel stacking machine comprises a profile steel conveying mechanism, a stacking mechanism, and a stack package transfer roller bed (7) for moving a stack package out of a stacking station; the grouping trolley (3) is used for automatic grouping of profile steels, and arranged between the profile steel conveying mechanism and the stack package transfer roller bed (7). By using the technical solution, seamless coupling of the full-automatic profile steel stacking machine and a rolling line is realized; further, by using an automatic bundler and a finished product conveying system both matching with the full-automatic profile steel stacking machine, a full-automatic and unmanned production process of a factory is realized, the technical level of the production technology of an enterprise is improved, the operating cost is reduced, the product quality may be controlled better, and the economic benefit is obvious.