Developing　new　and　facile　strategies　for　multiple-site　reversible　chemical　absorption　of　pollutant　gases　is　of　wide　interests　in　chemical　engineering　research.　Herein,　a　series　of　lithium　(Li)-triethylene　glycol　(TEG)–chelated　ionic　liquids　(ILs)　with　crown-ether-like　cation　and　different　anions　were　designed.　The　Li-TEG–chelated　ILs　were　prepared　in　quantitative　yields　by　simply　mixing　equimolar　TEG　and　Li　salts.　It　is　found　that　the　chelation　of　TEG　with　Li+　activates　the　hydroxyl　sites　in　TEG　for　strong　interaction　with　ammonia　(NH3).　Thus,　the　hydroxyl　sites　chelated　with　Li+,　as　well　as　the　chelation-unsaturated　Li+,　provide　the　multiple　sites　for　chemical　absorption　of　NH3　in　Li-TEG–chelated　ILs.　Moreover,　the　absorption　of　NH3　in　Li-TEG–chelated　ILs　is　totally　reversible,　with　the　NH3　solubilities　remaining　unchanged　after　eight　times　of　recycling.　The　results　obtained　herein　can　provide　useful　guidance　for　the　construction　of　gas　absorbents　with　high　capacity　and　excellent　reversibility.　©　2022　American　Institute　of　Chemical　Engineers.