Combined with the characteristics of mathematics, Mr. Cao illustrated how to obtain valuable information from the massive information provided by abstract database (secondary literature database). How to use various analysis tools provided by the network platform; How to retrieve articles, periodicals and conferences; And document delivery and interlibrary loan. At the same time, she recommended the "academic search of reading show" to everyone, pointing out that this kind of search integrates books, periodicals, newspapers and other resources into the same platform by using knowledge integration technology, and realizes unified search, which has the advantage of going deep into chapters and full texts. Finally, Mr. Cao sincerely hopes that the students here can make full use of the valuable information resources provided by the school library and climb the peak in scientific research. The importance of information retrieval in auxiliary scientific research is beyond doubt. Through targeted training, this lecture has enhanced freshmen's understanding and effective use of library resources, helped them master practical retrieval methods suitable for their majors, and improved their information literacy. The lecture ended with warm applause from the students.