Abstract: New educational equity is put forward in view of the previous research on educational equity, which is mostly macro research and external research, but ignores the perspective of human development in education. From the perspective of new educational equity, teachers need to play a fair role and change the traditional view of teachers' role. The traditional role of teachers cannot meet the needs of students' development under the new educational equity. From the perspective of new educational equity, the problems of teachers' fair role mainly include teachers' ignoring the fair development of students in all dimensions, ignoring the suitable development of all students, and being unable to effectively play a fair role in practice. Based on this, teachers should establish the role view of fairness promoter and enhance the awareness of role transformation; Break through the shackles of traditional ideas and promote the fair development of all students; Continuous learning and reflection to improve the level of fair practice.