The invention provides a temperature sorting device of an intermediate-frequency heating furnace and a control method of the temperature sorting device of the intermediate-frequency heating furnace. The temperature sorting device of the intermediate-frequency heating furnace can automatically isolate and store blanks, excessively high or excessively low in temperature, output from a discharging opening of the intermediate-frequency heating furnace in the heating process and enables blanks meeting a heating temperature requirement to enter a forging furnace to be forged; and meanwhile, because the raw materials entering the forging furnace are in a temperature controlled environment, the use demand of a die is met, and the service life of the die is prolonged. The bottoms of an over-temperature discharging channel and a low-temperature discharging channel are both provided with storage boxes or conveyer belts, the storage boxes or the conveyer belts are matched with the over-temperature discharging channel and the low-temperature discharging channel, so that the blanks output by the over-temperature discharging channel and the low-temperature discharging channel can be automatically conveyed to corresponding positions, and it is not needed that the relevant blanks not meeting the temperature requirement are manually taken out at the over-temperature discharging channel and the low-temperature discharging channel; and in this way, efficiency is improved, and construction hidden danger is lowered.