Refuse landfill leachate treatment method and system

The invention discloses a refuse landfill leachate treatment method and system. The method comprises the following steps: adding a coagulant into leachate raw water for coagulating sedimentation to obtain a mixed solution; carrying out filter pressing on the precipitate in the mixed solution to obtain filter-pressed effluent; carrying out microfiltration treatment on the supernatant in the mixed solution to obtain microfiltration concentrated water and microfiltration produced water; reflowing the filter pressing effluent and the microfiltration concentrated water into the percolate raw waterfor circular treatment; and finally, carrying out two-stage DTRO treatment and resin adsorption treatment to obtain up-to-standard produced water. Long-term stable operation of the landfill leachate treatment system is ensured through multiple combined processes, and up-to-standard discharge of produced water is ensured; part of organic matters and large suspended particles can be removed throughcoagulating sedimentation,