At present,the geographical nature of the climate change issue is becoming more and more prominent,and its impact on international order is constantly increasing.Major countries and regions have formulated strategies and policies to deal with climate-related challenges in order to ensure their own security and competitiveness in the context of climate geopolitical competition and cooperation.For decades,the EU has laid weigh upon the link between climate change and security,and has been actively committed to integrating climate security into relevant policy areas.EU's climate security concepts and policies have accumulated considerable influence at the international level.Analyzing and interpreting the EU's climate security policy is of great practical significance for the construction of China's climate security governance system and influence in global security governance norm.Based on the relevant policy documents issued by the EU over the past two decades,this article summarizes the development of its agenda in different stages,and finds that in recent years,the EU has accelerated the agenda in an increasingly complex situation,especially reflected in climate security actions in the defense field.In view of the cross-issue characteristics of climate security itself,the EU has carried out actions in the three policy areas of foreign affairs,development and defense,using relevant policy tools to deal with the security challenges posed by risks related to climate change,and has made certain progress at the level of EU institutions and member states.In the future,the EU will continue to promote the climate security agenda at the bilateral and multilateral levels,committed to the realization of its climate goals and leadership.In the face of this trend,China can establish a climate security strategy that is in line with my country's development and climate governance goals,and actively carry out relevant dialogues under the Global Security Initiative and the Global Development Initiative to explore cooperation to address climate risks.