NOVELTY - Hydrolysis-blowing treatment method comprises adjusting pH value of nickel-ammonia wastewater at 4-6 using dilute sulfuric acid at 15-45 degrees C, and adding biological agent; mixing at 100-300 rpm and performing protonation reaction for 5-20 minutes; adding neutralizing agent i.e. alkali to adjust pH value of reaction system at 10-12 and hydrolyzing for 10-20 minutes; and adding 0-10 g/L flocculating agent to accelerate precipitation, and performing pressure filtration to obtain wastewater containing ammonia and slag containing nickel.    USE - Hydrolysis-blowing treatment method for nickel-ammonia wastewater derived from chemical industry, metallurgy and galvanization (claimed).    ADVANTAGE - The ammonia gas is absorbed for preventing secondary pollution, and the slag containing nickel can be used in nickel reclaiming. The nickel-ammonia wastewater can be processed cleanly and efficiently. The concentrations of nickel and ammonia in water meet the Integrated Wastewater Discharge Standard.    DETAILED DESCRIPTION - Hydrolysis-blowing treatment method comprises adjusting pH value of nickel-ammonia wastewater at 4-6 using dilute sulfuric acid at 15-45 degrees C, and adding biological agent, where mass ratio of biological agent to nickel in wastewater is 0.2-1.0:1; mixing at 100-300 rpm and performing protonation reaction for 5-20 minutes; adding neutralizing agent i.e. alkali to adjust pH value of reaction system at 10-12 and hydrolyzing for 10-20 minutes; and adding 0-10 g/L flocculating agent to accelerate precipitation, and performing pressure filtration to obtain wastewater containing ammonia and slag containing nickel. The biological agent is prepared by culturing chemoautotroph flora including Thiobacillus ferrooxidans and Thiobacillus thiooxidans in 9K culture medium, adding 10-150 g ferrous sulfate heptahydrate in each liter of culture medium, controlling temperature at 20-40 degrees C, mixing and reacting for 1-7 hours to obtain 100-160 g/L biological agent solution; and performing solid-liquid separation on biological agent solution, and drying solid phase at 100-200 degrees C to obtain solid biological agent.