Taking into account the main trends and consequences of deep transformations of the geopolitical and geoeconomic space, there was a need to conduct thorough research in the field of ensuring the border security of our state, as a component of national security, as well as defining a clear place and role of the subjects of its guarantee in the course of the implementation of the specified function, especially with the emergence of new types of threats, in particular, the military aggression of the Russian Federation, which on February 24, 2022 entered the phase of open confrontation against Ukraine, its temporary occupation of the territory of the Autonomous Republic of Crimea and the city of Sevastopol, the Kherson region and a number of other territories of our state. In turn, there was an urgent need to justify the structure and content of the modern model of border security as the basis for the further development of the State Border Service of Ukraine, in addition, for Ukraine, the issue of border security, given the course of Euro-Atlantic integration and the latest expansion of the European Union, the geopolitical position of Ukraine determines the the fact that the borders of our state play an important and universally recognized role in the formation of the pan-European security system. It should be noted that the interests of Ukraine and the European community regarding the management of common borders certainly coincide. This is the provision of reliable protection of long stretches of the state border of Ukraine; unhindered legal crossing of the border by citizens and vehicles at checkpoints along with a high level of control procedures; proper management of migration flows; effective counteraction to manifestations of organized cross-border crime, etc. Our state supports the creation of a fundamentally new European security system based on non-power (political, economic, social, energy, environmental, informational, etc.) aspects. Thus, it is necessary to justify the structure and content of the border security model, which is the basis for the formation and implementation of modern border policy of the European model, in particular, bringing the border legislation of Ukraine to the norms of European law; ensuring the readiness of human resources; technical re-equipment; achievement of the state-of-the-art infrastructure of the state border; information integration; a qualitatively new level of cross-border cooperation. In view of the above, the article develops the conceptual principles of border security of Ukraine, its border policy, as well as the mechanism of their implementation. Completion of the above-mentioned tasks will contribute to the implementation of Ukraine's strategic course for integration into the European Union and will ensure an increase in the effectiveness of the State Border Service of Ukraine in the field of ensuring the national interests of the state in general and at the state border in particular.