The present study examined three main issues：the structure and types of ethnic-national identity，factors related to the way people manage their multiple identities，and the relationship between ethnic-national identity and intergroup perceptions.To investigate these issues，some Han and minority community residents from Kunming and Zhaotong in Yunnan province are recruited to complete a battery of questionnaires.The results can be understood from four aspects.First，ethnic and national identity is positive correlated，while there are also significant discrepancies between them.Secondly，the proposed two dimensions structure of ethnic-national social identity is verified to be reasonable，and four types of ethnic-national identity are found as integration，ethnic，nation and diffuse.Thirdly，ethnic composition of the neighborhoods is related to the minorities' ethnic-national identity.Lastly，people with different ethnic-national identity exhibit different intergroup perceptions.