When writing a thesis involving code content, graduates must write their own code if they want to pass it smoothly. For convenience, some students will choose to copy the existing code directly when writing their papers. Although these codes can also provide some help for everyone's paper writing, the effect is not ideal, and it will also lead to a high repetition rate of the paper. Therefore, when writing involves the relevant content of the code, students must write it themselves, treat the paper seriously and responsibly, and pass the test more easily when the repetition rate is detected. When the code of extended data is copied, the cross-reference mode of code is actually not much different from that of text. What graduates should do most is to ensure that the code is written by themselves. Of course, in addition, for some people who don't have a thorough grasp of relevant knowledge, they can choose to solve the problem of code duplication by inserting pictures. Screenshot the code in Word, insert the content, and finally detect and submit it. This paper detection method can also promote the problem of duplicate code in the paper to be better solved and avoid the influence of duplicate code on the overall repetition rate of the paper.