Abstract: With the continuous expansion of doctoral students enrollment, doctoral students have gradually become the main group scientific research activities in China. The research status of doctoral students is closely related to the training quality of doctoral students, the quality of higher education, and the academic level. Through in-depth interviews with 107 doctoral students in Beijing University of Aeronautics(BUAA), and based on three levels of coding, this research defined the five major influencing factors of research burnout for doctoral students, they are respectively, physiological pressure, psychological stress, individual ability pressure, scientific research situation factors, and social environmental factors. The five major influencing factors are further divided into internal pressure factors and mediating factors. Through further research, it is found that the internal stress factors are the root cause factors that affect the burnout of doctoral students. However, the internal stress factors can only lead to the occurrence of doctoral students' research burnout through the effect of intermediary pressure factors. Therefore, the birth of doctoral students' research burnout is not the result of a single factor, but a kind of negative emotion caused by the interaction of various internal stress factors.