The main difference between the second and third editions of Principles of Ideological and Political Pedagogy is in the content. The second edition was published in 2012, and the main content includes the basic concepts of ideological and political pedagogy, the historical development of ideological and political pedagogy, the basic principles of ideological and political pedagogy, the basic tasks of ideological and political pedagogy, and the basic methods of ideological and political pedagogy. The second edition is more comprehensive, covering the basic theory and practice of ideological and political pedagogy. The third edition was published in 2018, and compared with the second edition, it mainly added the elaboration of socialist thought with Chinese characteristics in the new era and the discussion of socialist core values. In addition, the third edition also adds the application of ideological and political pedagogy in the era of big data and the discussion of ideological and political education of young people. The third edition pays more attention to the theoretical discussion and practical application of ideological and political pedagogy in the context of the new era. In general, the third edition focuses more on the theoretical discussion and practical application of ideological and political pedagogy in the context of the new era than the second edition, and the content is richer and more in-depth.