1, subject classification. The library of China West Normal University can classify books according to their themes and contents, such as literature, history, science and art, and each theme has a unique category or classification number.

2. Classification of the author's surname. This classification method classifies books according to the author's surname, so that the works of the same author can be classified together.

3. Classification of publication year. This classification method classifies books according to the year of publication, so that books published in the same period can be classified together.