NOVELTY - Sewage treatment method comprises introducing sewage into facultative biochemistry reactor for facultative biochemistry reaction to separate facultative sludge, effluent and generated gas; introducing effluent into strengthened artificial wetland comprising pre-processing area, chemical oxygen demand (COD) degradation area and dephosphorization area; and flowing back part of effluent into facultative biochemistry reactor, further passing effluent into strengthened artificial wetland to discharge after processing a denitrification; and directly discharging other part.    USE - Method for treating sewage.    ADVANTAGE - The method can effectively enhance the removing ratio of organic matter, ammonia nitrogen, total nitrogen and total phosphorus of wetlands and provides good water quality and large water amount. The utility model has low investment cost, convenient debugging operation and simple management, and does not need an operator.    DETAILED DESCRIPTION - Sewage treatment method comprises:    (A) introducing sewage into a facultative biochemistry reactor for a facultative biochemistry reaction at first so as to separate facultative sludge, effluent and a less amount of generated gas;    (B) introducing the effluent into a strengthened artificial wetland comprising three functional sections; where a first area is a pre-processing area; multiple aerator pipes are arranged on the bottom part; the aerator pipes are oxygen filling pipes which are not opened while operating normally; when a water temperature is reduced or an inflow pollutant concentration is increased, the aerator pipes are opened to ensure an effluent effect of the wetlands; a second area is COD degradation area and a dephosphorization area; the wetland filler of the area is dephosphorization filler; a dephosphorization is processed to the sewage processed by the first area in the second area; a third area is a nitration area; multiple aerator pipes are further arranged on the bottom part; under the oxygen filling effect of the aerator pipes, COD in the dephosphorized sewage is continuously reduced in the third area so as to complete an ammonia nitrogen nitration process in the sewage and make the effluent have an oxygen enrichment; and    (C) flowing back a part of the effluent of the strengthened artificial wetland into the facultative biochemistry reactor; further passing the effluent into the strengthened artificial wetland to process and discharge after processing a denitrification; and directly discharging the other part so as to complete the sewage treatment.    DESCRIPTION OF DRAWING(S) - The drawing is a block diagram of a sewage treatment method based on facultative biochemistry-strengthened artificial wetland (Drawing includes non-English language text).