To discuss physical education (P.E.) teachers serving as head teachers, it should be reasonable and evidence-based. Previous studies did not provide sufficient scientific evidence to answer this hotly debated question. Therefore, this study first adopted rigorous experimental research methods, focusing on analyzing whether a P.E. teacher serving as a head teacher would affect student performance. On this basis, the robustness of the experimental results was verified through qualitative research. The results showed that a P.E. teacher serving as a head teacher would not adversely affect students' academic performance and maybe more conducive to students' overall development. Based on this conclusion, we further suggested how to improve the appointment and management of head teachers.