The invention belongs to the technical field of automobile accessories and provides an automotive radiator grille decorating electroplated bright strip assembling structure which comprises a bright strip body and a grille body. Multiple self-tapping screw mounting columns and two clamping claws are arranged on an inner-side mounting face of the bright strip body, locking pieces matched with the self-tapping screw mounting columns and inserting grooves matched with the clamping claws are arranged on the grille body respectively, each inserting groove is composed of an inserting portion and extending connection portions on two sides, the clamping claws and the bright strip body form a whole through the extending connection portions, inserting direction of each inserting portion is uniform with transverse direction of the corresponding inserting groove, and a thickening portion is arranged at a junction between each inserting portion and the corresponding extending connection portion and is of a non-sharp-angled structure. The automotive radiator grille decorating electroplated bright strip assembling structure has the advantages that under the premise that performance is guaranteed, appearance performance of an automotive radiator grille decorating strip is guaranteed, rejection rate of injection molding and electroplating processes is greatly reduced, die processing technique is improved, die service life is prolonged, and wind dryness after the automotive radiator grille decorating electroplated bright strip assembling structure is mounted on an automobile is prevented.