Faced with the problem of declining birthrate, many schools are facing the dilemma of insufficient enrollment. In addition to maintaining the visibility and environment of the school, the degree of teachers' job involvement will further affect the quality and learning effect of the students, so lead the teachers forward. The leader of the school is a key player. The principal's management style will bring management ideas and ethos to the schools. The principal leadership of the principals can make the teachers' job involvement more focused and become one of the school's competitiveness sources. The purpose of this study is to explore the relevance of the leaders of the National Primary School and the teachers' work commitment. According to the research of this thesis, there is no significant correlation between the principal leadership of the principal and the personal background of the teacher. This study uses regression analysis to prove that the principal's leadership style is a sincere leadership (fair treatment, internalized morality, transparency, self-awareness) helps to increase the level of teacher’s job involvement. Among them, the fair treatment method has the highest influence, which means that if the principal can listen to the feedback of the teachers and communicate with the teachers in a timely manner, teachers can increase the trust between the teachers by understanding the situation of the students. Work investment will also increase.
