NOVELTY - Method for processing intensive pig farm feces, involves mixing pig manure and production wastewater in a manure mixing tank to obtain a manure liquid, allowing the manure liquid into a regulating tank, conveying the manure liquid to a reactor from the regulating tank, generating biogas slurry, biogas and biogas residue, discharging the biogas slurry into a tank for farm irrigation, feeding the biogas into a tower for desulfurization and then into a water-sealed tank, storing biogas separated from liquid, and allowing the biogas to pass into a biogas pipeline.    USE - The method or device is useful for processing intensive pig farm feces and producing biogas slurry, biogas and biogas residue. The biogas slurry is useful for farm irrigation. The biogas residue is useful as organic fertilizer (all claimed).    ADVANTAGE - The method processes pig manure and urea wastewater cost-effectively which are applied to several related industries.    DETAILED DESCRIPTION - Method for processing intensive pig farm feces, involves mixing pig manure and production wastewater in a manure mixing tank to obtain a manure liquid, allowing the manure liquid into a regulating tank, where a heating boiler enables high-temperature water or high-temperature steam at preset temperature to flow into the regulating tank, mixing content in the regulating tank uniformly, conveying the manure liquid to a upflow solids reactor (USR) from the regulating tank, after the manure liquid is treated by the USR reactor, generating biogas slurry, biogas and biogas residue, discharging the biogas slurry into a biogas slurry tank for farm irrigation, feeding the biogas into a desulfurizing tower for desulfurization and then into a water-sealed tank, storing biogas separated from liquid in the water-sealed tank in a gas storage holder, and allowing the biogas in the gas storage holder to pass into a biogas pipeline through a flame retarding unit. An INDEPENDENT CLAIM is included for device, which comprises manure mixing tank, regulating manure tank, regulating tank, heating boiler, USR reactor, liquid tank, desulfurizing tower, water-sealed tank, gas storage holder, biogas pipeline and flame retarding unit.