Abstract: Based onan empirical study of the Mongolians in Tonghai,Yunnan province,it is found that cultural adaptation is a sufficient,yet unnecessary condition for inter-ethnic intermarriage.For inter-ethnic intermarriage,cultural adaptation in the political field is an important core of it,ethnic psychological blending is the deep root of it,cultural adaptation in geographical and social fields is the objective condition of it,and inter-ethnic intermarriage does not necessarily lead to the elimination of ethnic minority traditional culture.In the case of the gradual increase of inter-ethnic intermarriage,the Mongolians in Tonghai still have a strong desire to inherit their own culture.This shows that the practical path of cultural adaptation of ethnic minorities is complex and multi-faceted,and inter-ethnic intermarriage is a way to achieve deep-seated ethnic cultural exchanges and psychological integration.The construction of the pluralistic pattern of the Chinese nation still needs the support of ethnic minorities' cultural adaptation in more fields.

Key words: inter-ethnic intermarriage, cultural adaptation, Mongolians in Yunnan