The youths'' "accidental socialization" represents a unique paradigm of socialization initiation, social interaction, social relationships, and socialization targets, etc., reflecting the characteristics of a "random and unpredictable" triggering mechanism, a "simple and casual" communication method, an "ephemeral" connection state, and a meaning generation from "mutual trust and development". The emergence of this paradigm results from the joint action of individuals, society, culture, and space, relying on the "natural escape" from tiring socialization, the "situational incubation" in fluid living scenarios, the "subtle infiltration" of non-utilitarian socialization ideals, and the "objective empowerment" in mobile public spaces. To scientifically guide the youths'' "chance socialization" paradigm, it is essential to continuously deepen self-awareness and cultivate basic literacy of "positive socialization", to enforce social support and respond to actual "healthy socialization" needs, to clarify behavioral boundaries and cultivate awareness of "wise socialization" acts, to create a sound closed loop and develop a social ecology of "benign socialization", in order to lay a solid foundation for the quality development of the Party''s youth work in the new era.