The invention discloses a high-efficiency and low-consumption standard-reaching treatment method for wastewater from scale piggery raising. According to the high-efficiency and low-consumption standard-reaching treatment method, after the wastewater from raising is subjected to solid-liquid separation through a hydraulic screen, 60-90 percent of wastewater enters an up-flow type anaerobic sludge blanket reactor; mostly COD (Chemical Oxygen Demand) is converted and methane is recovered; effluent enters an aerobic zone of a step-fed sequencing batch reactor for treatment; after the aerobic treatment is finished, the effluent and 10-40 percent wastewater enter an anoxic zone for denitrification; meanwhile, the basicity is replenished and the mixer enters a precipitation zone; supernate enters a magnesium ammonium phosphate crystallization reactor for recovering nitrogen and phosphorus; pig manure is added into residual sludge generated by the up-flow type anaerobic sludge blanket reactor and the step-fed sequencing batch reactor for treatment and then the mixture is fermented in a high-concentration anaerobic digester to generate methane; biogas slurry and biogas residue which are used as high-quality organic fertilizer are fertilized to the farmland; the generated methane is used for generating power; and electric energy is supplied to wastewater treatment equipment for operating. The high-efficiency and low-consumption standard-reaching treatment method disclosed by the invention has the advantages of simple process, convenience in resource recycling, long-term stable and reliable treatment effect and proper construction, operation and maintenance expenses.