With the spread of new online media, the turmoil and randomness of public opinion have exacerbated the cultural identity of college students. The cultural identity of modern college students is mainly reflected in four aspects: traditional cultural identity, general cultural identity, cultural belief identity and practical ability. This paper studies and studies the cultural identity of contemporary college students under the background of informationization. Using the method of literature research, this paper summarizes the problems existing in the cultural identity of contemporary college students and the main factors affecting the cultural identity of college students; analyzes the influence of cultural identity, and then uses the questionnaire survey method to investigate the cultural identity of contemporary college students under the background of information technology. The results show that: 67% of college students think that ethics and morality are the core content of traditional culture; 12% of college students think that it is the way of interpersonal communication; 11% of college students think that it is a traditional way of thinking; 10% of college students think that this is an excellent cultural works. As a result, knowledge life has not yet reached the inevitability of surpassing the domination and guidance of economic inevitability by market economy culture. Traditional culture still plays an important role in social life.