The invention discloses a connecting structure of a stand column and cross beams, and belongs to the technical field of civil engineering structures. The connecting structure is formed through connection of the vertical stand column and the four transverse cross beams, the stand column is provided with four vertical outer side faces, the four cross beams are welded to the four outer side faces ofthe stand column correspondingly, and the cross beams are composed of upper retaining faces, lower retaining faces and connecting reinforcements enabling the upper retaining faces to be connected withthe lower retaining faces. The connecting structure is used for enabling the stand column to be connected with the cross beams in a civil engineering structure, the steel cost is saved to the greatest extent on the basis that the strength is improved, and the connecting structure has the advantages that the shock resistance is high, and the service life is long.