Due to the fact that teacher leadership has an essential impact on student learning, teacher professional development, organizational effectiveness and school-community relation management, it is important to analyze and reflect the theory of teacher leadership. Firstly, we analyze the meanings, concepts and areas of teacher leadership. Secondly, we explore the relationship between micropolitics and teacher leadership. Thirdly, we discuss some possible problems and reflections about the theory of teacher leadership. Finally, we provide some comments on the implementation and research of teacher leadership.