The invention discloses a whole belt replacing method for hot-blast stove shells, and belongs to the technical field of hot-blast stoves. The whole belt replacing method for the hot-blast stove shells includes the following steps that a plurality of original stove shells are removed through Nth ring belts on the hot-blast stoves; the multiple replaced stove shells are assembled onto the Nth ring belts and are further welded with (N-1)th ring belts and (N+1)th ring belts, and the multiple replaced stove shells are welded with one another; flaw detection is carried out on the multiple replaced stove shells after welding; and the multiple replaced stove shells after flaw detection are subjected to heat treatment annealing. According to the whole belt replacing method for the hot-blast stove shells, the stove shell can be replaced while completeness of refractory matter inside large blast-furnace hot-blast stoves is kept and stove shell bearing is guaranteed, the problems that the stove shells at high-temperature areas of the hot-blast stoves are seriously cracked and welded joints are repeatedly cracked are solved, and safe and stable operation of the hot-blast stoves is ensured.