Around the Paris Agreement formally went into effective,many oil companies were active in taking action on climate change. The major international oil companies to take the idea of reducing emissions,the proposed carbon dioxide emission reduction strategies and specific practices were analyzed and summed up in this article. Oil companies were very careful about the issue of carbon dioxide emission. It was wise to take necessary steps to meet emission requirement at the same time to reduce the impact on the main business. They skillfully combined the business development strategy and emission reduction target together in order to highlight the various ways of reducing carbon dioxide emission,to focus on energy saving,alternative low carbon energy,the development of carbon dioxide capture and utilization and so on. The analysis concluded that first of all,these strategies could not only help meet the goal of emission reduction for oil and gas companies,but also facilitate the related industry in the value chain and consumers to realize the emission reduction effect by providing low carbon energy,products and services. Second,the implementation of a diversified strategies can reduce risk. Third,the combination of climate change and long-term development of enterprises to deal with the top strategy to speed up technological innovation was to reduce the cost of emission reduction and to achieve the key of reducing emissions.