The Ideological instruction work is related to the future and destiny of socialism with Chinese characteristics. The arrival of big data era has brought opportunities and challenges to this arduous and glorious cause. The combination of science and technology represented by big data, Internet, cloud computing and Internet of things will inevitably lead to a new round of innovation and development. Through questionnaire survey, in-depth interview and literature analysis, this paper finds out the main problems of college students’ network Ideological instruction problems in the big data era. Through the questionnaire survey, we can see that the proportion of students who surf the Internet 4-6 hours and more than 6 hours a day is more than 47%, and more than 77% of the attention content in the school portal is academic achievement, combined with the extended interview with Ideological instruction workers in colleges and universities.