The paper firstly analyzes the general characteristics and role of the youth peer group environment, and then summary and summarized the new characteristics of the " post-90s " Students ' peer group through the questionnaire survey. 论文首先分析了青年同辈群体环境的一般特征及其作用,继而通过问卷调查总结和归纳90后大学生同辈群体的新特点。