The invention discloses an oxidation treatment device for the surface of structured packing. The oxidation treatment device comprises a treatment box. The structured packing to be treated is put in the treatment box. Gas entering slits are formed in the treatment box. The treatment box communicates with a heating pipe through the gas entering slits. The heating pipe communicates with a gas buffering tank through a connecting pipe. An air blower is arranged on the connecting pipe. A gas outlet hole is further formed in the treatment box. A box opening and closing door is arranged on one side of the treatment box. Passivating liquid or paste is not needed for the oxidation treatment device for the surface of the structured packing, operation is easy and convenient, cost is low, the temperature is adjustable, the requirement for the shape of a test piece is low, irregular and large samples can be treated, treatment is uniform, effects are good, and corrosion resistance is improved.