Language policy has always been an important component in the construction of national unity in multi-ethnic countries. After the disintegration of the Soviet Union, the five Central Asian republics also faced a significant problem in national construction and political cultural transformation, as well as a dual challenge of maintaining political stability and protecting ethnic diversity. As a carrier of symbols and memories, language has profound national and political values. Therefore, the adjustment of language policies has become one of the key elements in the process of national construction. Language policies in multi-ethnic countries adopt three paths: unitary, dual and diversified. The five Central Asian countries after independence have been particularly prominent on this issue. Although their specific means are different, their common goal is to consolidate the status of national language for the main nationality. In the context of globalization and the increasingly complex international environment it creats, the five Central Asian countries must adopt a gradual language reform strategy to address the tension between internal stability and external harmony, and gradually build up a good political and cultural environment.