NOVELTY - Treating livestock and poultry breeding sewage, comprises separating fecal solids in sewage, conveying adjusting tank sewage into efficient nitrogen phosphorus biochemical circulating treatment system to carry out biochemical treatment and improved oxidation ditch aerobic aeration biochemical treatment, clarifying and separating residue water, refluxing, conveying part of refluxed sludge into efficient nitrogen phosphorus biochemical cycling process system, carrying out pressure filtration, clarifying and mixing with disinfectant, filtering, and discharging clear liquid into clean water tank.    USE - The method is useful for treating livestock and poultry breeding sewage.    ADVANTAGE - The method has high ammonia nitrogen, total nitrogen and total phosphorus removing ability, and low investment and operating cost; can meet the requirements of national livestock and poultry breeding water pollutant discharge standard GB18596-2001; solves the problems of livestock and poultry breeding industry sewage treatment discharge, degradation of organic compounds and ammonia removal; and is suitable for different scale farming, breeding farms sewage treatment, municipal sewage with high COD or characteristics of high strength ammonia wastewater treatment.    DETAILED DESCRIPTION - Treating livestock and poultry breeding sewage comprises separating the fecal solids in the sewage, conveying the filtrate into an adjusting tank, conveying the adjusting tank sewage into an efficient nitrogen phosphorus biochemical circulating treatment system to carry out biochemical treatment and improved oxidation ditch aerobic aeration biochemical treatment, then conveying into a secondary sedimentation tank to clarify and separate residue water, refluxing a part of sludge precipitate into a improved oxidation ditch, conveying a part of refluxed sludge into an efficient nitrogen phosphorus biochemical cycling process system, carrying out pressure filtration of the redundant sludge, which is used as organic fertilizer raw material, clarifying and mixing with disinfectant, conveying into a filter tank for filtering suspended solids, returning the filtered and backwashed water to the adjusting tank again, and finally discharging the clear liquid into a clean water tank.