Low-energy-consumption argon-hydrogen full-recovery cold box of argon recovery device and using method thereof

The invention relates to a low-energy-consumption argon-hydrogen full-recovery argon recovery device cold box and a using method thereof.The low-energy-consumption argon recovery device cold box comprises a cold box body, an argon purification tower, a waste gas stripping tower, a nitrogen generation rectifying tower, an oxygen tower, a main heat exchanger, a nitrogen expansion machine and a subcooler are installed in the cold box and connected through pipelines, and the nitrogen generation rectifying tower is composed of a lower tower and an upper tower; a nitrogen-making condensation evaporator is mounted in the middle of the waste gas stripping tower, the waste gas stripping tower consists of an upper waste gas stripping tower condenser, a lower waste gas stripping tower evaporator and a middle tower body section, the argon purification tower consists of a purification tower condenser, a purification tower evaporator and a middle tower body section, and the oxygen tower consists of a tower body and a reboi