Abstract: Mao Zedong's nationalism thought during the Anti-Japanese War enriched and developed the related theory of Marxism's classical writers，and played a very important role in the formation，maintenance and consolidation of the Anti-Japanese National United Front.Mao Zedong's nationalism thought during the Anti-Japanese War was an important part of Mao Zedong's thought，It not only played an important role in the history，had the great historical significance，but also has important reference significance in realizing the Chinese dream of great rejuvenation of the Chinese nation today.