Peer group is an important source of cultural socialization of minority adolescents，but few studies have sought to consider it. In this study，we analyze some related articles and conduct an open-ended questionnaire survey，in order to study the fundamental categories and the characteristics of different types of peer cultural socialization between Dai adolescents，and also，to explore its occurring situations. The conclusion of analysis suggests that Dai adolescents mainly convey seven types of cultural socialization messages between their peer groups，which includes ethnic customs，ethnic arts，ethnic markers，ethnic language and characters as well as calendar，ethnic personality and ethnic values，according to the descending sequence of the frequency. Its occurring situations include festivals，ethnic consciousness motivating，curious explore and discussion about cultural diversity，in which the ethnic consciousness motivating and curious explore sometime occur during traditional festivals. These conclusions offers empirical evidences to improve the theoretical assumption of cultural socialization，and to explore the occurring backgrounds of cultural identity of cross-border Dai.