Climate change is a severe challenge faced by all mankind，posing a major threat to global energy，technology，ecological environment and human health and well-being. To achieve the goals of the Paris Agreement，all G20 members have submitted or updated their Nationally Determined Contributions （NDCs），clarified carbon neutrality targets，and most G20 members have also raised their 2030 greenhouse gas emission reduction targets，promulgated or revised their special laws or policies to deal with climate change and clean energy development，so that it will expand the space for clean energy development. Since February 2022，the gradual escalation of the conflict between Russia and Ukraine and the ups and downs of the global epidemic have had an important impact on the global energy supply chain，forcing countries to rethink energy security and clean energy policies. Therefore，it is of great practical significance to study the G20 carbon neutrality goals and policies，especially the development trend and impact of clean energy，to participate in the global climate negotiation agenda and the formulation of international rules，and build a fair，reasonable，cooperative and win-win global climate governance system，cope with the climate crisis and green barriers，and promote the construction of a green “Belt and Road”.