This paper proposes a value dimension and realization way of online ideological and political education in colleges and universities based on deep learning. Firstly, a deep learning teaching platform is established, which is conducive to teacher-student communication, teachers can better grasp the focus of teaching, and students can be more clear about their learning status. The classroom teaching reform and auxiliary learning reform are carried out in three dimensions: theoretical classroom, practical classroom, and guided classroom. And a multi-dimensional response theory model is established to create conditions for the comprehensive and free development of college students so as to realize the value dimension of online ideological and political education in colleges and universities. The results show that more than 55% of students get political information through major portals and through students’ ideological and moral performance on the Internet, and then implement targeted education, which can effectively improve students’ online moral literacy.