1 to 3 months. According to the official website graduation interface of Xi Jiaotong University, after the doctoral thesis defense is completed, the school will immediately submit an application for issuing a degree certificate, and 1 can get the graduation certificate within three months. The specific time may be different due to the school regulations and the approval time of the Academic Affairs Office, and will be notified separately. Xi Jiaotong University, referred to as "Xi Jiaotong University", located in Xi, Shaanxi Province, is a comprehensive research-oriented national key university directly under the Ministry of Education of China.