NOVELTY - A poultry breeding sewage is treated by fermenting sewage for 12-15 days; removing organic substances from the sewage with a medium-temperature fermenting method; recycling the generated marsh gas; transporting the discharged marsh liquid to a multistage bionic oxidizing ditch and keeping for 3-6 days to dissolved oxygen; degrading the organic substances, denitriding and dephosphorizing; transporting the discharged water to a multistage artificial geological quick-permeating system; and passing through filtration medium to obtain supernatant discharged meeting the standard.    USE - Method of treating poultry breeding sewage (claimed).    ADVANTAGE - The method is low cost, has low energy consumption, and has high treating efficiency.    DETAILED DESCRIPTION - A poultry breeding sewage is treated by:    (A) discharging the poultry breeding sewage into a drain ditch;    (B) removing impurities via barrier inside a drain ditch;    (C) settling the sewage in a sand settling tank to remove solids;    (D) transporting the sewage to a collecting tank and then to an acidification regulating tank;    (E) acidifying and hydrolyzing the organic and macromolecular substances;    (F) allowing the sewage to settle to separate insoluble pollutants;    (G) transporting supernatant to a red mud plastic anaerobic fermenting apparatus;    (H) fermenting the sewage for 12-15 days;    (I) removing organic substances from the sewage with a medium-temperature fermenting method;    (J) recycling the generated marsh gas;    (K) transporting the discharged marsh liquid to a multistage bionic oxidizing ditch and keeping for 3-6 days to dissolved oxygen;    (L) degrading the organic substances, denitriding and dephosphorizing;    (M) transporting the discharged water to a multistage artificial geological quick-permeating system; and    (N) passing through filtration medium to obtain supernatant discharged meeting the standard.    An INDEPENDENT CLAIM is included for a system for treating poultry breeding sewage comprising:    (1) a sewage preprocessing system including a sand settling tank, a drain ditch having one end connected to poultry breeding sewage outlet and another end connected to input end of sand settling tank, a barrier set inside the drain ditch, a water collecting tank and an acidification regulating tank;    (2) a red mud plastic anaerobic fermenting apparatus;    (3) a multistage bionic oxidizing ditch;    (4) a multistage artificial geological quick-permeating system;    (5) a gas storage bag; and    (6) a pressure booster.    DESCRIPTION OF DRAWING(S) - The drawing is a flow chart of a method of treating poultry breeding sewage. Drawing includes non-English language text.