The invention relates to the technical field of devices of thermal treatment furnaces and heating furnaces, in particular to a distributing device applied to cooling water of an industrial furnace. According to the technical scheme, the distributing device comprises a main water inlet pipe and a main water returning pipe; a water amount distributor is arranged at the tail end of the main water inlet pipe and connected with a plurality of water inlet branch pipes; the water inlet branch pipes are connected with the water inlet ends of corresponding cooling parts through pipes; a water inlet ball valve, a flow meter and a thermometer are installed at the portion, between each cooling part and the water amount distributor, of the corresponding water inlet branch pipe; a water amount distributor is arranged at the start end of the main water returning pipe and connected with a plurality of water returning branch pipes; the water returning branch pipes are connected with the water outlet ends of the corresponding cooling parts through pipes; a water returning ball valve, a flow meter and a thermometer are installed at the portion, between each cooling part and the water amount distributor, of the corresponding water returning branch pipe. Use is simple, after the distributing device is used, convenience is brought to operation spot checking and maintaining, and the distributing device is suitable for being popularized in a whole enterprise.