In the current social environment, the role of ideology and politics courses is increasingly prominent, and effective learning of ideology and politics courses is of great significance for college students to establish the correct value concept. Under the influence of the primacy effect, the judgment of the teacher will appear very one‐sided, that is, through only one meeting, can not make an objective and comprehensive judgment of this person, and because of the primacy effect produced by the inherent impression is difficult to eliminate, which further affects the educational effect of the ideology and politics class in colleges and universities. In this paper, we will analyze the different effects of the primacy effect on the central and marginal objects, so as to complete the analysis of the role of the primacy effect on the Civics and Politics classroom.