For multicultural countries around the world, "ethnic groups' problems" represent a very important dilemma and it is also an important issue for cultural policy studies. Furthermore, if countries are unable to face internal ethnic relation challenges and national ethnic groups' problems, these ones may impact them and lead to fundamental influences on the international level, particularly on the reputation of a government and can erode the nation's image. Every country needs research on the subject, that research can also be a logical reflection, an analysis of ethnic national problem which will contribute to maintain and consolidate country' stability.This paper is a survey of the current situation of ethnic minorities in Xinjiang Uyghur Autonomous Region in China. It aims mainly to demonstrate that the implementation of Chinese cultural minority policies is not conform to the national legal system intention to legislate minority protection. This paper will try to understand if the government's cultural minority policies in China respect the policy of multiculturalism, the protection of fundamental values, and if they respect international organization concept. To understand the problem of Uyghur minority group, this paper provides three main points. First, it examines the legal system of ethnic minorities in China, then it compares the legislation with international codifications which China adhere. Next, according to fieldwork, the paper explores the interethnic relations between Han and Uyghur and ethnic minorities' culture which had been emerge in Xinjiang since last years. Finally, the paper analyzes ethnic minorities' problems in Xinjiang according to the theory of multiculturalism.