The invention relates to a method for producing methanol and synthetic natural gas by taking coke oven gas as a raw material. The method can be used for simultaneously producing the methanol and liquefied natural gas by regulating the hydrogen-carbon ratio of the gas by collecting CO2 from smoke gas and then carrying out methanol synthesis and methane synthesis in series. The method comprises the following steps: firstly carrying out pretreatment of removing tar, benzene, naphthalene and the like on the coke oven gas, and then adding the CO2 collected from the combusting smoke gas of a coke oven by adopting a compound amine absorption method to regulate the (H2-CO2)/(CO+CO2) of gas to 2.2-3.1; after the mixed gas is compressed, desulfurizing by virtue of an NHD method, and then carrying out hydrogenation conversion and fine desulfurization to obtain a pure qualified synthetic gas; and firstly synthesizing the pure qualified synthetic gas into methanol by virtue of a methanol synthesis catalyst, separating the generated methanol, then synthesizing into methane under the action of a methane synthesis catalyst, and deeply freezing a generated gas to obtain the liquefied natural gas with alkane content more than 94%. The process can be used for realizing resource recycling and CO2 emission reduction by recovering CO2 from the smoke gas, has the advantages of simple flow path of a production process and low operating cost and is an energy-saving and environmental-friendly production process.