Abstract: Strengthening the unity among all ethnic groups and pooling the broad struggle strength is an important guarantee for realizing the great rejuvenation of the Chinese nation. Since the 18th CPC National Congress, Xi Jinping has made many important remarks on how to do ethnic work well in the new era, which has become a theoretical basis and practical guide for doing ethnic work well in the new era. Xi Jinping’s important discourses about national work are rooted in the excellent traditional culture, inherited in Marxist national theory, summarized in the concrete practice at home and abroad, examine the “time and situation” in the new era, clear the main body of national work, determine the specific method of national work, and solve a series of issues of “Who will do?”, “What to do?” and “How to do?” in the national work, with the strategic thinking, system thinking, the law thinking and the dialectical thinking to promote national work orderly. Xi Jinping’s important exposition on ethnic work is based on China’s reality, adheres to China’s position, constructs Chinese discourse, develops ethnic theory with Chinese characteristics, establishes a framework system for ethnic work in the new era, and also provides Chinese wisdom and Chinese solutions for other countries to solve ethnic issues.