First of all, the object of teacher education is students. Teachers exert influence on students through purposeful, planned and systematic education, and students are the object of the education process. By mastering the scientific and cultural knowledge and skills taught by teachers, students can cultivate the basic ability of social life and develop in an all-round way under the influence of teachers. Therefore, teachers play a leading role in the education process.

Secondly, students are developing people and the subject of cognition. Students' physical and mental development is regular, and the most basic requirement of educational activities is to respect the laws of students' physical and mental development at all stages. Educators should carry out educational activities suitable for students' development stages according to their characteristics. Teachers should transform the achievements of human cognition into students' knowledge and intelligence, and internalize them into students' ideological and practical activities. Students' active participation and subjective initiative are the key. Therefore, in the process of education, students are always active participants in educational activities, the subject of cognition or the master of learning. Students play a leading role in the process of educational activities.

The leading role of teachers and the main role of students are interactive and dialectical unity. Giving full play to students' main role is inseparable from teachers' leading role, which must also fully mobilize students' enthusiasm, initiative and creativity. Only when students actively participate can they achieve all-round development.