The invention discloses a plate scale processing method in the operation of a plate-shell body type blast furnace evaporation air cooling system, and belongs to the technical field of blast furnace ironmaking production. The plate-shell body type blast furnace evaporation air cooling system comprises a base, a shell body which is fixedly connected with the upper portion of the base, and cooling plate bundle sets which are fixedly installed inside the shell body and are arranged in a vertically layered mode, and the system further comprises induced draft cooling towers which are arranged on theshell body and are fixedly connected with the shell body. According to the plate-shell body type blast furnace evaporation air cooling system, fans are used for air suction are replaced by the induced draft cooling towers, and therefore, fan motors do not need to be replaced and repaired frequently due to the fact that the motors are prone to damage after being affected with damp, the normal working state can be kept for a long time, electric energy is saved, and water consumption of refrigerant water is reduced. According to the plate scale processing method, plate scale removal can be carried out in the operation process of the whole system in a periodical, timed and physical manner, flexibility is achieved, and the processing effect is thorough, so that the heat exchange and cooling effects of the whole system are improved, and the continuous operation time and the service life are prolonged.