The moral growth of students has obvious stages and repetitiveness. The complexity of moral education lies in the fact that it faces growing individual students. The complexity of students' moral formation is mainly reflected in the fact that students' moral growth is the result of multiple factors, which requires comprehensive consideration of school, family, society and other influencing factors in the process of moral education. The moral growth of students has obvious stages and repetitiveness, which requires educators to have enough patience and confidence. The moral growth of different students has distinct individual characteristics.