The utility model discloses a denitrification bological aerated filter is nitrified to upper reaches integral type, including be located upper portion play water treatment unit, be located the middlepart biological filter processing unit and be located the bottom cloth water treatment unit, biological filter processing unit mainly includes the oxygen workshop section that becomes reconciled of anaerobism workshop section, has middle water layer between two workshop sections, good oxygen workshop section below is equipped with water distribution gas distribution orifice plate, and middle waterlayer is equipped with aeration disc, aeration disc and intake -tube connection, middle water layer lower extreme is anaerobism workshop section, and anaerobism workshop section below is equipped with the supporting layer, and the supporting layer below is the water distribution orifice plate, anaerobism workshop section is by mainly compriseing the anaerobism packing layer, and good oxygen workshop section mainly comprises good oxygen packing layer, the utility model discloses an anaerobism good oxygen biological treatment combination, anaerobism are used for leading denitrification and organic matter decomposition, good oxygen be used for nitrifying with the mineralize mineralization organic matter, be equipped with oxygen workshop section simultaneously and has flow back to anaerobismworkshop section to realize the high efficiency and utilize the carbon source, and get rid of ammonia nitrogen and nitrate nitrogen the time.