The duplicate checking rate of undergraduate thesis generally needs to be lower than 30%. Some schools or majors have strict requirements, and the specific duplicate checking rate is subject to the requirements of each school. The duplicate checking rate is the result of comparing and analyzing the test paper by the duplicate checking system, which reflects the proportion of duplicate content in the test paper. If the duplicate checking rate is too high, that is, the repetition rate is higher than 30%, it may be judged as academic misconduct, leading to failure, postponement of graduation or even cancellation of student status. Therefore, it is suggested that when writing graduation thesis, we should abide by academic ethics and norms, complete the thesis independently, and pay attention to avoiding plagiarism and repeated quotations.