Abstract: Agitation that separates ethnic minority groups from the Han in recent ethnic cultural research and propaganda has done great damage to our national unity and strengthened the existing dual structure in national relation，leading to populism and ultranationalism，which is likely to be utilized by separatist forces and anti-China forces to split China.In the course of ethnic cultural research and propaganda，attention should be paid to the generality instead of difference，to national unity instead of hostility，protecting cultural heritage from the perspective of public cultural services.At the same time，a multi-dimensional discourse system should be established so that we can have greater discourse power in ethnic issue and make Chinese unity known to the world.

Key words: the Han, separation, research of ethnic culture, propaganda of ethnic culture, discourse power