This article analyzes the need to reform the Common Security and Defense Policy of the European Union in the long term, with a particular focus on the threat, posed by the russian federation. The growth of russia's aggressiveness and foreign policy ambitions creates the need to strengthen and adapt the security and defense policy of the European Union. A number of decisions, adopted by the European Union as a countermeasure to russian aggression against Ukraine, are analyzed. The article also examines the reasons that led to the need for institutional reform and key aspects of it, including the strengthening of the Union's military capabilities, the development of the cyber security sector and the expansion of cyber defense infrastructure, ensuring an increase in joint financing of the defense sector and cooperation with strategic partners. The importance and necessity of political unity and joint action among the member states of the European Union, strengthening of defense capabilities, defense cooperation, improvement of crisis management mechanisms and provision of mutual assistance between member states for effective response to threats from russia were emphasized. The article calls for intensive cooperation and coordination between the European Union and the North Atlantic Treaty Organization, as well as for strengthening external partnerships with countries that share common values and have common security interests in the implementation of joint projects and programs in the field of security and defense to ensure stability and security in the region. Reforming the Common Security and Defense Policy is a key factor in ensuring Europe's collective security in the medium and long term, taking into account the needs and challenges of the modern geopolitical environment, and through joint action, the European Union can act as a united front in security solutions and international cooperation