Natural gas from overseas large natural gas fields basically contains sulfur, condensate oil and a mass of heavy hydrocarbon. In order to ensure smooth operation of gas transportation pipeline, it is necessary to remove heavy hydrocarbon and hydrocarbon recovery from natural gas has great economic value. Natural gas condensate recovery process can be divided into such two steps as temperature reduction and gas/liquid separation at low temperature. Analyzed are causes of hydrocarbon dew point failing to meet relative requirements specified in production contract of hydrocarbon dew point control unit of a natural gas purification plant in Turkmenistan and corresponding improvement scheme is proposed according to analysis results.