Big data shows that the delayed graduation rate of doctoral degree reaches 60%, this data shows the following problems:

First of all, the quality of training and education level of doctoral degree students have certain problems. As an elite group in higher education, the quality of doctoral students' training is directly related to the national scientific and technological innovation ability and the cultivation of high-level talents. However, there are some problems in the current cultivation process of doctoral students, such as insufficient guidance from supervisors and a weak academic atmosphere, which leads to some doctoral students not being able to complete their studies on time.

Secondly, the psychological pressure of doctoral students is high. Doctoral students face great academic pressure, life pressure and employment pressure in the process of pursuing doctoral degree. These pressures may lead to psychological problems for doctoral students and affect their academic progress. In addition, doctoral students often need to devote a lot of time and energy to scientific research during their doctoral studies, which may also lead to their inability to complete their studies on time.

Once again, the training mode and management system of doctoral students need to be reformed. At present, the training mode of doctoral students in China is mainly based on the supervisory system, and this mode is to some extent conducive to cultivating the independent thinking and innovation ability of doctoral students. However, with the development of the times, this mode has also exposed some problems, such as tense resources for supervisors and disharmonious relationship between teachers and students. Therefore, it is necessary to reform the mode of training and management system of doctoral students in order to improve the quality and efficiency of doctoral training.

Finally, the society expects too much from doctoral students. In some people's conception, doctoral students should be the elites of academia with high academic level and innovation ability. However, in reality, not all doctoral students can reach such a standard. Therefore, the society should establish a correct concept of talent, respect the individual differences of doctoral students, and give them more care and support.