Here,206 Liangshan-Yi were investigated to explore the basic conditions and influence factors towards both ethnic identity and national identity, which will offer practical evidence to strengthen the national identity of all ethnic groups. Results showed excellent developing tendency of Liangshan-Yi’s ethnic identity and national identity. The national identity is priority to ethnic identity without obvious conflicts. The Yi’s ethnic identity and national identity are unstably influenced by many objective factors such as ages,living district,and parents’ nationality. In contrast,the social factors such as educational background,professional category,income,Chinese level and friends’ nationality could impact on Yi’s ethnic identity and national identity in obviously and stability.