The discourse system is an important carrier of ideology, and ideology must rely on the discourse system to express and disseminate. The discourse system of ideological and political education carries the content and expression of ideological and political education, and the degree of its improvement and the role it plays directly determine the effectiveness of curriculum ideological and political education. The research on discourse in ideological and political education in foreign language education mainly focuses on what the connotation of discourse in ideological and political education is, which elements it includes, how it operates and plays a role in teaching practice, how educators complete discourse conversion and carry out effective discourse dissemination, and so on. Through these researches, the discourse system of ideological and political education in foreign language education is established. Combined with Marxist theory, discourse criticism theory, and communication theory, the basic concepts and content of the discourse system of ideological and political education are clarified, and the basic elements and operation process of the discourse system of ideological and political education are analyzed.