Landfill leachate treatment system

The utility model discloses a landfill leachate treatment system, which comprises a garbage incinerator, a heat exchanger and a leachate pool, a combustion cylinder, a hearth and a smoke outlet are arranged on a furnace body of the garbage incinerator, the smoke outlet is provided with an outlet which is connected with the heat exchanger through a pipeline, and the heat exchanger is connected with a side tuyere of the combustion cylinder through a fan; the leachate pool is connected with the heat exchanger through the pump, and the heat exchanger is connected with the spray gun of the combustion cylinder. The garbage incinerator has the beneficial effects that garbage leachate is incinerated while the garbage incinerator is used for incinerating garbage, so that the garbage and the leachate are integrally treated; the generation of nitrogen oxides is reduced by adopting a flue gas recirculation mode; waste heat discharged by the garbage incinerator is fully utilized, so that the garbage leachate is treated ne