This paper analyzes Master degree candidates (2015‐2019) academic achievements on their diploma courses in Xi'an University of Posts and Telecommunications, and finds that there exists a high rate of failure on students' specialized basic courses. Further research indicates that the number and proportion of professional Master degree candidates (PMDC) who fail in their courses are more prominent than those of academic Master degree candidates (AMDC), and the average score of specialized basic courses is also lower than that of academic Master degree candidates. The causes of this situation are researched in detail, and corresponding measures are put forward.