Landfill leachate treatment method

The invention relates to a landfill leachate treatment method. The landfill leachate treatment method comprises following steps in sequence: pretreatment comprising steps of flocculating sedimentation, ammonia stripping, ammonia adsorption and processes of regulating pH and adjusting the temperature of the leachate to be not lower than 15 DEG C, primary anoxic-aerobic biological treatment, primary sedimentation treatment, chemical oxidation treatment, secondary sedimentation treatment, secondary anoxic-aerobic biological treatment, tertiary sedimentation treatment and disinfection treatment. According to the landfill leachate treatment method, a physicochemical and biochemical combined treatment system is adopted based on the characteristics of the municipal solid waste landfill site leachate, so that stable and efficient operation of the whole system is guaranteed, and the landfill leachate reaches the emission standard of Standard for Pollution Control on the Landfill Site Of Municipal Solid Waste (GB16889-2008) finally.