The specific requirements of duplicate checking rate of master's graduation thesis should be determined according to the requirements of our own school. At the same time, it should be noted that when checking the duplicate of master's graduation thesis, we should choose a formal duplicate checking system, such as HowNet, paperfree, papertime and so on. However, the duplicate checking system only detects the repetition rate of the paper and cannot judge the academic level and value of the paper. Therefore, when writing a master's thesis, it is necessary to follow academic norms and the principle of good faith to ensure the originality and academic value of the thesis.