The invention provides a landfill leachate zero-emission treatment device, which comprises a membrane treatment system, a deamination system, an adsorption system, a curing system and an evaporation system. The membrane treatment system is used for filtering landfill leachate to generate a first produced water product and a first concentrated water product, the first produced water product is sentinto a deamination system to remove ammonia nitrogen so as to obtain a second produced water product and an ammonium salt, the first concentrated water product is sent into an evaporation system forevaporation to obtain evaporation condensate water and evaporation residue, the evaporation residue is sent into the curing system for curing treatment, and the second produced water product is sent into the adsorption system for adsorption so as to obtain the final produced water. The membrane treatment system is employed to treat landfill leachate to remove most of COD and total hardness, then the deamination system is adopted to recycle most of the ammonia nitrogen and convert the recycled ammonia nitrogen into an ammonium salt for resource utilization, and a concentrated solution of the membrane treatment system is subjected to low-temperature evaporation and re-curing treatment so as to achieve the effect of zero emission.