Not only express the anthropology pay attention to the marriage but also express the anthropology care for the people through ethnic identity and ethnic interaction in the intermarriage.

The Tangut people’s intermarriage to the people of other nationalities in the neighborhood,especially of Han nationality was common after they moved inland.

Especially the ethnic intermarriage, not only reflects the relations between individuals, but also the demarcation, evaluation and selection of a .

This study shows that cultural differences between different nationalities are the main factor influencing the scale of inter-racial marriages when,in a multi-national area,the society develops stably,different nationalities enjoy equal political rights and different nationalities live together harmoniously.

Population floating has enlarged the inter-ethnic marriage circle of the Bai people and has expanded their spouse selecting channels.

Through investigating the inter-ethnic marriages between the Mongolian and the Han nationality in Yingzi Village,a rural Mongolian village in Yantai,the essay summarizes the evolution of the villagers′ marriages from within Mongolian nationality to inter-ethnic marriage with the Han nationality from the ancient times to the present.