NOVELTY - Drying and liquefying natural gas comprises de-acidifying raw material, entering gas firstly into the plate-fin heat exchanger in the cooling tank for cooling, setting the cooling heat exchanger to 5 degrees C to 20 degrees C, entering natural gas into the water tank from the tank bottom removing water, entering natural water tank in absorption drying system, after dehydrating the natural gas in the heat exchanger is cooled to 30 degrees C to -60 degrees C, and separating the heavy hydrocarbon separator top gas phase stream that continuously enters the heat exchanger.    USE - The method is useful for drying and liquefying natural gas (claimed).    ADVANTAGE - The method is improved based on the current technique flow, and can reduce natural gas drying system, and can reduce adsorbent consumption.    DETAILED DESCRIPTION - Drying and liquefying natural gas comprises de-acidifying raw material, entering gas firstly into the plate-fin heat exchanger in the cooling tank for cooling, setting the cooling heat exchanger to 5 degrees C to 20 degrees C, entering natural gas into the water tank from the tank bottom removing water, entering natural water tank in absorption drying system, after dehydrating the natural gas in the heat exchanger is cooled to 30 degrees C to -60 degrees C, and separating the heavy hydrocarbon separator top gas phase stream that continuously enters the heat exchanger and is cooled to 130 degrees C to 166 degrees C after flowing out from the heat exchanger in the cooling tank to obtain the liquefied natural gas. An INDEPENDENT CLAIM is a natural gas drying and liquefying process device comprising an absorption drying system, a refrigerant compression system and a cold box system, where the refrigerant compression system is provided with a gas-phase refrigerant outlet passage, a liquid phase outlet channel and the inlet channel, where the cold box system comprises a group of plate-fin heat exchanger, comprising at least six heat exchange channel the first, the second, the third, the fourth, the fifth and the sixth heat exchange channel, the heat exchange channel and the first passage through the second heat exchange pipe is respectively connected with the liquid phase outlet channel and gas phase refrigerant outlet of the refrigerant compression system.