Full-quantitative treatment system and treatment method for landfill leachate

The invention discloses a full-quantitative treatment system and treatment method for landfill leachate. The treatment system comprises a first solid-liquid separation unit, wherein the first solid-liquid separation unit is used for treating leachate and outputting first mother liquor; a first membrane separation unit, wherein the interception rate of the first membrane separation unit on COD in the first mother liquor is larger than or equal to 90%, and the first membrane separation unit is used for treating the first mother liquor and outputting first permeate and first concentrated liquor; a heat treatment unit which is used for carrying out heat treatment on the first concentrated solution and outputting a solid-liquid mixture and a gas mixture; a condensing unit which is used for treating the gas mixture and outputting non-condensable gas; a tail gas treatment unit which is used for treating the non-condensable gas and then outputting tail gas reaching the emission standard; a second solid-liquid separat