The informal organization of college teachers has a unique function in the college student’s ideological and political education, which is an important force that cannot be ignored to strengthen and improve the college student’s ideological and political education. The function of teachers’informal organization has both positive and negative effects. In order to realize the ideological and political education function of teachers’informal organizations, we must master and use effective methods and ways to give full play to its positive effects, control its negative effects, and create a favorable environment for the all-round and healthy development of college students.