Natural gas is an important clean energy. In recent years, the proportion of clean energy in the global energy structure has continued to rise, and the vigorously developed natural gas industry has become an important choice for countries to protect the environment and promote sustainable economic development. However, natural gas is usually accompanied by a certain amount of CO2 in the extraction process, which would not only cause a decrease in calorific value, thus increasing transportation costs, and eroding pipelines and equipment. It is necessary to decarbonize it before pipeline transportation and use. At present, the common methods to remove CO2 from natural gas are divided into an absorption method, adsorption method, low-temperature separation method, membrane separation method, and new decarbonization technology. This paper introduces the process characteristics and industrial application cases of each kind of technology and guides the selection of the decarbonization process under different actual conditions, which is of important engineering significance.