Abstract: The application of building photovoltaic systems in airport buildings is an important measure for airports to achieve energy saving and emission reduction, improve energy utilization efficiency, and promote sustainable development. Taking airport buildings as the research object, this paper deeply analyzes the application modes of building photovoltaic systems in airport scenarios and comprehensively explores the key points of electrical design, aiming to provide strong technical support and theoretical basis for the efficient and safe application of building photovoltaic systems in airport buildings.