In order to improve the decision-making performance of student pilots and explore the impact of student pilots" emotional stability on their decision-making performance under different time pressure, Flight Simulator software and eye movement instrument were used to simulate the approach and landing flight scenes under different time pressure, and the impact of student pilots" emotional stability on decision-making performance was measured by Cattell 16 Personality Factor Questionnaire(16PF). The experimental results show that time pressure has a negative impact on student pilots" decision-making performance; the emotional stability of student pilots has a significant impact on their fixation pattern and decision-making performance; the average fixation time of student pilots plays a complete mediating role in the impact of emotional stability on decision-making performance, while its fixation counts plays a partial mediating role in the impact of emotional stability on decision-making performance. Therefore, the flight safety level can be improved by improving the emotional stability of student pilots and further affecting their fixation pattern and decision-making performance.