Abstract: Acculturation,as an important concept in cultural anthropology,has undergone a long and bitter course since it was introduced from biology into cultural anthropology.Comprehension of scholars at different times has led to much deviation in the research method and content of cultural anthropology,thus appear many branches of learning.By analyzing the nature of acculturation,this paper illustrates the relationship between the special cultural evolution and the degree of acculturation,sets up an acculturation system of ethnic culture and bio-adaptability,and tells the difference between bio-adaptability and acculturation.

Key words: acculturation, special evolution, degree of acculturation, bio-adaptability