NOVELTY - Pig farm wastewater treatment device comprises solid waste processing system and odor processing system. The waste water processing system comprises waste water collecting pool, filler type anaerobic reaction pool (1), waste water regulating pool, aerobic contact oxidation pool, reflux type aeration biological filter chamber and clean water pool. Filler type anaerobic reaction pool is set with baffle plate (1-1). Baffle plate is provided in facultative section (1-2), anoxic section (1-3) and anaerobic section (1-4). Facultative section is provided with wastewater enter the water inlet pipe.    USE - Pig farm wastewater treatment device.    DETAILED DESCRIPTION - Pig farm wastewater treatment device comprises solid waste processing system and odor processing system. The waste water processing system comprises waste water collecting pool, filler type anaerobic reaction pool, waste water regulating pool, aerobic contact oxidation pool, reflux type aeration biological filter chamber and clean water pool. Filler type anaerobic reaction pool is set with baffle plate. Baffle plate is provided in facultative section, anoxic section and anaerobic section. Facultative section is provided with wastewater enter the water inlet pipe. Anoxic section end is connected with anaerobic section end connected, and both are connected with water inlet side baffle plate at lower part with angle of 45 degrees. Anaerobic section end is provided with three phase separator and overflow weir. Aerobic contact oxidation pool in lower part is equipped with water inlet pipe, which is set with cloth water pyrometric cone. Reflux type aeration biological filter pool the upper part is cylindrical shape and lower part is a conical structure. Conical structure comprises downstream area, upper flow area and a sludge area. An INDEPENDENT CLAIM is included for a method for treating pig farm wastewater, which involves:    (A) processing pig wastewater in collecting pool through water inlet pipe and filler type anaerobic reaction pool facultative section;    (B) performing hydrolysis of organic acid, and then decomposing by using macromolecule organic matter;    (C) separating sludge and alkyl in anaerobic section end setting separator and regulating carbon, nitrogen and phosphorus ratio in wastewater;    (D) regulating oxygen content in aerobic contact oxidation pool, and then sedimenting the sludge;    (E) entering in wastewater in cloth water pipe to carry out biochemical reaction and filtering in filter chamber to discharge solid waste and pig excrement mixture after entering into the compost pool; and    (F) treating the wastewater by using ozone and removing odor and gas.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of pig farm wastewater treatment device.    Filler type anaerobic reaction pool (1)    Baffle plate (1-1)    Facultative section (1-2)    Anoxic section (1-3)    Anaerobic section (1-4)