With the globalization and the population mobility, individuals communicate with various groups and are put into a completely open system. Therefore, the boundaries of state and national communities, which had previously acted as a barrier, have been broken down, and the discourses surrounding identity are shifting to a situation-based approach that respects the individual's subjective choices. In particular, the signs of “liquid modernity”, which are constantly running through, require people to respond flexibly to the flow of change in their identity choices. This paper aims at clarifying “flexible identity” which selected by individual’s behavior and will in the context of the overall change of the social structure of overseas Chinese in Korea. The results show that after the establishment of the Cold War system, the identity of the overseas Chinese in Korea is endowed with destiny by the two axes of nation-state, and the identity of the individual is consistent with the group’s identity. In the 1990s, when the Cold War was dismantled, especially after the establishment of diplomatic relations between South Korea and China in 1992, they will gradually get rid of collective detention and form the self-discipline of new relations. At the same time, they will also experience a period of identity confusion and contradiction. As a result, the third identity of “overseas Chinese in South Korea” which transcends the nation-states framework appeared and goes out live in South Korea. In addition, this third identity is not the same change within the overseas Chinese community, but is constantly divided according to the differences of personal status and identity.