In order to explore whether there is a national difference in the development of the character advantage of primary school students in multi-ethnic areas, a sample of 1,369 primary school students of Korean, Manchu and Han nationality was sampled in Fushun City, Liaoning Province, analyzes the ethnic differences in the development of character superiority of multi-ethnic primary school students through questionnaire survey. It is found that there is a certain difference in the overall development level of the character of the Korean, Manchu and Han nationality students. The Korean primary school students are more prominent in the advantages of “insight”, “good learning” and “good understanding”. Han students are in the “love” advantage. The development is more prominent, and the overall development level of Manchu primary school students' character is weak. In addition, among male students and sixth-grade primary school students, the ethnic differences in character strengths are more obvious. Based on this, the educational countermeasures for the development of the character strengths of different nationalities are proposed.