Global warming is having a huge and profound impact on mankind while addressing climate change has already become a global consensus. With the announcement of peaking emissions before 2030 and achieving carbon neutrality before 2060，the concept of carbon neutrality has led the trend of domestic development in China. As an innovative measure to combat climate change，carbon neutrality of mega events has been adopted and promoted with the ideology of low-carbon management and environmental protection. As a landmark activity at this historical node，the promise of carbon neutrality of the 2022 Beijing Winter Olympic Games has showed China’s determination to deal with climate change. This paper studies the connotation，requirements，implementation process and path of carbon neutrality of mega events，and analyzes the carbon neutrality measures taken by the 2022 Beijing Winter Olympic Games，so as to provide policy recommendation for carbon neutrality of other domestic mega events and help to fulfill the commitment of peaking emissions before 2030 and achieving carbon neutrality before 2060.