With the continuous development of Chinese civil aviation industry, the airport construction facilities built in different periods of time have suffered from the dilemma of idle, abandoned or even demolished, so it needs to be protected and utilized from the perspective of industry. Taking the historical buildings of Tianjin Airport as an example, this paper first expounds the development course of Tianjin Airport construction, and then delimits the protection scope and functional partition of the airport historical buildings by means of field survey and textual research, and then the AHP and Delphi method are used to evaluate the comprehensive value of the historic buildings of Tianjin Airport. Finally, according to the evaluation results, it is proposed to apply to the overall protection planning of the historic buildings of Tianjin Airport.