This thesis is a case study based on the observation of how reforms in the concepts of harmony teaching in normal universities have influenced the selection of textbooks. The department of Music in Putian University has changed the textbooks of harmony teaching for 4 times, which has diverse influences on the effectiveness of teaching. This thesis endeavors to compare these textbooks and their related effectiveness, analyze the bemusement and blindness in the process from the perspectives of teachers and students alike, and propose some solutions to the problem, that is，becoming more diligent or practicing more，including not only that in classroom, but also extra-curricula activities.