Ideological and political education is a science that guides people to form correct ideological behavior. It takes the law of the formation and change of people's ideological behavior and the law of the implementation of Ideological and political education as its research object. The essence of ethics is the science of moral issues, and it is the systematization and theorization of moral ideas. Although as two different discipines, they have their own research objects, in fact, they have certain interdisciplinary features. One of the most important things in common is that they play an important role in the construction of reflexivity. The pursuit of free and comprehensive development, as the most essential demand of human beings, objectively requires people to construct self reflexivity, which needs the guidance of scientific knowledge. This is the academic mission and value embodiment of Ideological and political education and ethics. This paper discusses how to better play the role of the two in constructing human reflexivity.