This study explore the impact of military policy on college students in deferred graduation phenomena. In the first part, we conduct a survey for the circumstances changes of military policy over years.The second part report the deferred graduation ratio from 89-104 year using data for universities,colleges and junior colleges release from Ministry of Education, including number of senior student in the previous year and the number of student deferred graduation. In the third part, Probit regression models are implemented to investigated the factors affecting the deferred graduation behavior. Finally, the impact of military policy on observed deferred graduation choice is studied.