1 Introduction With the rapid development of database technology and network communication technology, the current most of the university libraries have replaced the traditional artificial service mode with computer automation processing mode, and managed book borrowing and cataloging process through database technology [1]. Library book management system has stored a large amount of information after many years of accumulation. To find out hidden valuable information or some association rules is of great guiding significance for the library management and service [2]. The application of data mining technology in library management system is quite significant because it effectively find out the reading interest of teachers and students from the readers’ borrowing record, and the borrowing rules, recommend related books for readers, strengthen the integration and utilization of library resources, adjust book placement pattern. In addition, the full and affective application of this technology has very strong guiding significance for people to understand readers’ information needs in time, improve the library service quality and promote the library management [3].