Abstract: "Dan Xue" is a philosophy of life for young people in the Digital Age who pursue peace and a sense of enlightenment, reflecting their psychological tendency to lower expectations and seek spiritual relief at different stages. The "Dan Xue" mentality of young people is mainly manifested in low pursuit of ideals and beliefs, shallow socialization in interpersonal relationships, micro desires in material needs, and light experimentation in life experiences. Examining its generation mechanism mainly lies in the misunderstanding of the "Dan Ran" thought in traditional culture, the self reshaping of individual consciousness under social acceleration, the cognitive confusion of values under nihilism, and the solidification of network user circles under intelligent recommendation. The risks of spiritual crisis, social disorder, and the decline of mainstream ideology that arise behind "Dan Xue" are worthy of vigilance. A composite guidance system that integrates "ideological education-social support-technical correction" should be created to achieve positive guidance for the "Dan Xue" mentality of young people.