The invention discloses a garbage leachate treatment system, which comprises an evaporator, a heater and a steam compressor, wherein the evaporator is provided with a steam outlet, a garbage leachate feeding pipe, a concentrated solution reflow pipe and a concentrated solution outlet; a concentrated solution inlet, a heater steam inlet, a concentrated solution outlet, a condensed water outlet and a non-condensed steam outlet are formed in the heater; the steam outlet of the evaporator is connected to the steam compressor; an outlet of the steam compressor is communicated with the heater steam inlet of the heater; the concentrated solution outlet of the evaporator is partitioned into two paths, wherein one path is communicated to a concentrated solution discharging pump, and the other path is communicated to a forced circulation pump; the forced circulation pump is communicated to the concentrated solution inlet of the heater; the concentrated solution outlet of the heater is communicated to the concentrated solution reflow pipe of the evaporator. Secondary steam generated by an evaporation system is mainly taken as a heat source of the evaporation system. Secondary steam is recycled as a heat source.