Abstract: By using the methods of literature review and field investigation, the game behavior and interest motivation in the process of the internal governance of physical education in the county schools are analyzed and modelled based on the evolutionary game theory. The results show that the choice probability of school leaders, the participation of students and parents, the right and interest of physical education teachers, and the accountability of county-level government supervision can all cause changes in the direction of internal governance of school sports; The values, behaviors, attitudes and participation willingness of class teachers and culture teachers (the main subjects such as language and mathematics) will directly or indirectly influence its internal governance efficiency. As the leading party, school leaders are the core points of ''upward promotion'' and ''downward suppression'' in the internal governance process, while students and parent groups will influence the decision-making of school leaders and physical education teachers, and the three parties are in a closed-loop check and balanced mode. Suggestions are included as follows: Pay attention to the influence of the game of interests in the relations of the ''small circle'' in the county, and coordinate the balance of interests by ''comprehensive consultation''; Avoid the "intensive mobilization" behavior of the internal governance of school sports in the county and coordinate the supervision relationship by ''co-construction''; Strengthen the willingness of internal forces in county schools to participate in governance and build ''co-governance'' through regulatory means; Advocate the integration of the concept of school-family-society collaborative governance responsibility and build a ''three-party'' collaborative governance system.