The invention discloses a reinforcing bar bundling machine based on driven opening-closing clamping block devices. The driven opening-closing clamping block devices are used for replacing opening-closing guide tubes in a full-automatic mechanical hand reinforcing bar bundling machine with the publication number of 104925293A, and comprise bases and clamping jaws, wherein the top ends of the bases are bosses; grooves used for threading a bundling steel wire are formed in the top surfaces of the bosses; a plurality of bottom tables which are arranged in the length direction of the bosses at equal intervals are symmetrically arranged on the two sides of the base bosses; the bottom ends of the clamping jaws are hinged between the two adjacent bottom tables; the clamping jaws are connected through springs penetrating through the bosses; the springs provide clamping closing force for the clamping jaws; when the clamping jaws clamp objects and are closed, jaw heads of the clamping jaws are closed and in butt joint, and a threading channel is formed between the lower walls of the jaw heads of the clamping jaws and the grooves in the base bosses; and when the steel wire is pulled upwards, the steel wire in the threading channel generates upward thrust on the lower walls of the jaw heads of the clamping jaws, the clamping jaws are opened towards the two sides with hinge pins adopted as a rotating shaft, and the steel wire is pulled out of the threading channel.