摘要：【中文】本发明涉及天然气液化技术领域，特别涉及一种联产LNG和NGL的三循环混合冷剂天然气液化方法，该方法用于将预处理的天然气和第一混合冷剂、第二混合冷剂、第三混合冷剂分别在板翅式换热器中换热。本发明还提供一种联产LNG和NGL的三循环混合冷剂天然气液化的装置。本发明提供的联产LNG和NGL的三循环混合冷剂天然气液化方法，将通过预处理单元C₂⁺组分较高的高压天然气和三种混合制冷剂在冷箱换热器中换热，将天然气液化为液化天然气，并在此过程中回收天然气凝液。 【EN】The invention relates to the technical field of natural gas liquefaction, in particular to a three-cycle mixed refrigerant natural gas liquefaction method for coproducing LNG and NGL. The invention also provides a device for liquefying the natural gas by using the three-cycle mixed refrigerant for coproducing the LNG and the NGL. The three-cycle mixed refrigerant natural gas liquefaction method for coproducing LNG and NGL provided by the invention passes through the pretreatment unit C₂⁺High-pressure natural gas with high components and three mixed refrigerants exchange heat in a cold box heat exchanger to liquefy the natural gas into liquefied natural gas, and natural gas condensate is recovered in the process.