Abstract: In order to study the direct impact of the transformational leadership of the principal on the organizational commitment level of teachers and the mediating effect of teachers’ self-efficacy in the impact mechanism, the transformational leadership and teacher self-efficacy were designed for 520 high school teachers from many provinces and cities. By using AMOS 23.0,we construct a structural equation model to explore the mechanism of interaction between variables, combined with Bootstrap to introduce the teacher self-efficacy as a mediator variable for the empirical analysis. The analysis results show that the principal’s transformational leadership and teacher’s self-efficacy have a significant positive impact on teacher’s organizational commitment; teacher’s self-efficacy plays a partial intermediary role in the relationship between the principal’s transformational leadership and the teacher’s organizational commitment. The principal's transformational leadership influences teachers’ organizational commitment by affecting teachers’ self-efficacy.

Key words: transformational leadership, organizational commitment, self-efficacy, influence mechanism, mediation