In recent years, rural school sports PA has become a new round of education reform in China and an important way to promote the realization of the goal of "building a well-off society in an allround way". There are a series of problems in the current physical education teaching in primary and secondary schools. Taking a rural primary and secondary school in Hunan Province as the research object, this paper investigates, analyzes and evaluates the construction of middle school public course teachers under the background of post PA. The survey results show that the sports events of Rural Township Middle Schools in primary and secondary schools mainly include basketball, table tennis, badminton and aerobics, of which basketball accounts for 21%, table tennis accounts for 36%, badminton accounts for 24% and aerobics accounts for 19%. This shows that the primary and secondary school students' most sports are table tennis. Junior one students are more inclined to table tennis, accounting for 36%, junior two students are more inclined to badminton, accounting for 30%, and junior three students are more inclined to basketball. It accounts for 34%. Based on this investigation, this paper also puts forward some suggestions and measures to solve these problems and improve the quality level of post education, so as to further strengthen and improve the ability of rural school physical education and healthy development in Hunan Province, and promote the sound and rapid advancement of China's comprehensive education.