China Library Classification is divided into 5 basic categories and 22 major categories. Chinese phonetic alphabet and Arabic numerals are mixed, one letter represents a big category, and the alphabetical order reflects the order of big categories, and the number after the letter is used as a mark. In order to adapt to the development of industrial technology and the classification of this kind of literature, the two-letter classification of industrial technology is adopted.

The category names are as follows:

A. Marxism–Leninism, Mao Zedong Thought and Deng Xiaoping Theory

B. Philosophy, religion

C. overview of social sciences

D. Political, legal

E. Military affairs

F. Economy

G. Culture, science, education and sports

H. Language and writing

I. Literature

J. art

K. history, geography

Introduction to natural science

O. Mathematical science and chemistry

Page (abbreviation of page) astronomy, earth science

Q. Biological sciences

R. medicine and health

Southern agricultural science

T. industrial technology

Unit transportation

Verb (abbreviation for verb) aviation and aerospace

X. Environmental science, safety science

Z. comprehensive books

Extended data:

Basic structure

1, basic categories: For example, China Library Classification is divided into five categories: Marxism-Leninism, Mao Zedong and Deng Xiaoping; Philosophy; Social science; Natural science; Comprehensive books.

2. Basic category: the first category that constitutes the classification table. There are 22 basic categories in China Library Classification.

3. Summary table: a list of categories consisting of basic categories and the first and second categories directly expanded by them. For example:

4. Detailed catalogue: The catalogue consisting of various registered catalogues extended from the brief catalogue is the real basis of literature classification.

According to the contents, forms, genres and readers' usage of books, under the guidance of certain philosophical thoughts, books in various disciplines are divided into several categories according to their subject contents by using the principle of knowledge classification and the logical method, and each category is divided into many subcategories, and each subcategory is subdivided into molecular subcategories.

Finally, every kind of book can be divided into certain categories, and each category has a category number. Classified thesaurus is a collection of hierarchical classification numbers and categories.

References:

Baidu Encyclopedia-China Library Book Classification