Abstract: Current situation and existing problem of heavy hydrocarbon removal process in the LNG plant were analyzed. Taking the existing devices in Guangyuan LNG plant of China Natural Gas Corporation Limited as example, the processing capacity of which was 1 000×10³ m³/d(at 20 ℃ and 101.325 kPa), it is helpful to improve the effect of heavy hydrocarbon removal by adding a new adsorption equipment following the dehydration unit. Meanwhile, it can reduce the flow rate of flash gas, increase the liquefaction ratio of the natural gas, and decrease the unit energy consumption, as well as promote keeping the plant for a long-term and stable full load operation.