The methanation technology is the key part of synthesized natural gas making from coke oven gas (COG ). In this article,the development of methanation technology of COG at home and abroad is reviewed. Analyze and compare the technological process and characteristics of the main methanation technology. Furthermore,introduce the improving methods or measures of methanation technology- -adding CO2 ,no-recycle Steam,low temperature reaction,improved reactors and so on.%甲烷化工艺技术是焦炉气制备天然气的核心技术，本文主要介绍了目前国外和国内甲烷化技术发展概况，分析、比较了各项技术的工艺流程和特点。同时介绍了补碳工况、非循环蒸汽、低温反应、反应器改良等甲烷化工艺的改进技术方案。
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