In order to accurately and effectively evaluate the operational efficiency of arrival flights in the terminal area, based on the flight arrival efficiency and the capacity improvement capability of the airport terminal area, an efficiency evaluation index body for different runway operation modes and different types of flight procedures was established. An improved TOPSIS comprehensive evaluation model based on the entropy weight method was established to evaluate the efficiency of arriving flights in the terminal area. For the first time, the arrival efficiency index based on terminal area control load was introduced to evaluate the arrival efficiency of the flight, and the correlation analysis was carried out with the traditional efficiency index, which verified the rationality of the index. Finally, taking Nanjing Lukou Airport as an example, the AirTop software was used to simulate the isolated operation and independent operation of typical daily flights (traditional ILS mode, based on RNP AR technology and PMS technology), and compare and analyze various modes. The experimental results show that the approach efficiency under the PMS technology mode is optimal, with good approach efficiency and the ability to increase capacity. This study provides decision support for the perception of the airport′s operational efficiency and planning management.