The mail merging function of Microsoft Office Word2013 can be carried out for a batch of documents with the same basic content and a small amount of different data. In this paper, three examples are made: the cover of the class report card, the student status form (with photos) and the label of the file box. Through the three examples, this paper introduces the application of the function of mail merging in the filing of college students' records fully and meticulously. It is easy to operate and has high efficiency.