To achieve the goal of national independent contribution and carbon neutrality in addressing climate change,the European Union proposes the implementation of the Carbon Border Adjustment Mechanism(CBAM).The European Union is one of China's most important trading partners,and implementing this mechanism may have a se-ries of impacts on China's trade,and the cost of China's exports to Europe may increase.Inner Mongolia is an impor-tant energy and strategic resource base in China,as well as an important energy supply and manufacturing base.Al-though Inner Mongolia's exports to the European Union account for a relatively small proportion of the country's total(about 0.014%),the EU is Inner Mongolia's second largest export destination.It is of great significance to study in ad-vance the impact,opportunities,and challenges of the EU's carbon border regulation mechanism on Inner Mongolia.This article elaborates on the main content of the carbon border regulation mechanism,and analyzes in depth the im-pact,opportunities,and challenges of the mechanism on Inner Mongolia.It proposes response measures and sugges-tions from five aspects,in order to provide reference for Inner Mongolia to layout and respond to the EU's carbon bor-der regulation mechanism in advance.