The modernity of ideological and political education is the frontier topic of ideological and political education theory, which also forms pressure on the practice of ideological and political education. The essence of the modernity of ideological and political education lies in its consensus innovation orientation based on the reflection of the tradition of ideological and political education and the positive response to social modernization. However, the modernity of ideological and political education is in a complex situation, showing complex diversity in the process of elements, structure and mechanism. Open ideological and political education environment, risky ideological and political education situation and multiple ideological and political education context constitute the complex situation of the modernity of ideological and political education. In this situation, the social construction of the modernity of ideological and political education needs to closely follow the social and educational reality, clarify the construction direction, cultivate the construction thinking, adjust the construction strategy, grasp the multiplicity with the initiative spirit, and promote the modernization of ideological and political education.