The invention discloses a treatment method for a garbage leachate membrane concentrated solution. The treatment method comprises the following steps: feeding the garbage leachate membrane concentrated solution into a membrane separating device to remove degradation-resistant organic substances such as humic acid in the concentrated solution, mixing the outlet water of the concentrated solution with a reverse osmosis concentrated solution, then removing scaling ions such as Ca<2+> and Mg<2+> and other inorganic substances in the concentrated solution by softening, precipitating and filtering, introducing the outlet water into the reverse osmosis membrane to further concentrate, and realizing up-to-standard release of produced water; and finally, spraying back the concentrated water back to an incinerator for incineration, evaporative crystallization or outward processing. The treatment method can be used for realizing efficient treatment of the garbage leachate membrane concentrated solution, and has the advantages of being stable in operation, high in treatment efficiency, low in operation cost, convenient to maintain and manage, and the like in comparison with the existing treatment method for the garbage leachate membrane concentrated solution.