NOVELTY - Sewage treatment device with enhanced de-nitrification effect comprises a cavity for filling local soil (5) in the device body, and growing plant on the soil. A water inlet pipe through a three-way connector is connected with a device embedded in the upper part of soil in the horizontal water distribution pipe (3). The horizontal water distribution pipe is provided with two stop valves, where each stop valve is connected with a vertical air plastic sleeve. The horizontal water distributing pipe respectively through a Y-shaped interface (2) is connected with an inclined water distribution pipe.    USE - Used as a sewage treatment device with enhanced de-nitrification effect.    ADVANTAGE - The device is simple in structure; requires less surface area; has simple operation process; is easy to maintain; is economical; and has good purifying effect.    DETAILED DESCRIPTION - Sewage treatment device with enhanced de-nitrification effect comprises a cavity for filling local soil (5) in the device body, and growing plant on the soil. A water inlet pipe through a three-way connector is connected with a device, which is embedded in the upper part of soil in the horizontal water distribution pipe (3). The horizontal water distribution pipe is provided with two stop valves, where each stop valve is connected with a vertical air plastic sleeve. The horizontal water distributing pipe respectively through a Y-shaped interface (2) is connected with an inclined water distribution pipe. The other end of Y-type interface is connected with a vertical gas-guide tube. The inclined water distribution pipe passes through device body, and its end part is provided with trumpet-shaped port (6), which is provided with a detachable sealing cover head. The bottom of the device body is inverted trapezoid, and its lower part is provided with a collector pipe. The horizontal water distribution pipe and collector pipe wraps the gravel. The gravel is wrapped in permeable non-woven fabric (4). The inclined water distribution pipe is wrapped in multi-layer permeable non-woven fabric.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the sewage treatment device with enhanced de-nitrification effect.    Y-shaped interface (2)    Horizontal water distribution pipe (3)    Permeable non-woven fabric (4)    Soil (5)    Trumpet-shaped port (6)