NOVELTY - Sewage treatment method for artificial wet land comprises arranging a nano-scaled bubble oxygenation system (A) and a biological processing unit (B) in front of an artificial wet land system (C) sequentially; and allowing the sewage to enter the oxygenation system for oxygenation firstly, and then allowing yielding water to enter the biological processing unit for adsorbing, blocking, and degrading the organic matter in it, and allowing the yielding water to enter the wet land system for further treatment.    USE - Method for treating sewage (particularly volatile organic matter (malodorous)-containing sewage) of artificial wet land.    ADVANTAGE - The method can remove dirt at a short time.    DETAILED DESCRIPTION - Sewage treatment method for artificial wet land comprises arranging a nano-scaled bubble oxygenation system (A) and a biological processing unit (B) in front of an artificial wet land system (C) sequentially; and allowing the sewage to enter the oxygenation system for oxygenation firstly, and then allowing yielding water to enter the biological processing unit for adsorbing, blocking, and degrading the organic matter in it, and allowing the yielding water to enter the wet land system for further treatment. The nano-scaled bubble oxygenation system comprises an ultrasonic generator and an air pipe. The radiation surface of ultrasonic generator is put into the sewage and charges air into the sewage by air pipe continuously so as to oxygenate the sewage. The biological processing unit is mounted with a filter insertion slab (1) made from textile material, a biological filling filter layer (2), a leakage-resistant bottom (4), and a covering layer (3), in which the biological filling filter layer is arranged behind the filter insertion slab. The covering layer and the leakage-resistant bottom are respectively positioned at the top part and the bottom part of biological filling layer to form a filtering unit. The artificial wet land system can be surface current wet land, undercurrent wet land, and/or vertical flow wet land in series or in parallel.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of the device used for treating sewage of artificial wet land.    Filter insertion slab (1)    Biological filling filter layer (2)    Covering layer (3)    Leakage-resistant bottom (4)    Nano-scaled bubble oxygenation system (A)    Biological processing unit (B)    Artificial wet land system (C)