In recent years， problem of postgraduate academic misconduct has become more and more serious and has caused the attention of majority of educators and academics. In this paper， the con-notation of postgraduate academic misconduct was defined based on academic standards and comparison was made between academic misconduct and academic corruption. Meanwhile， this paper pointed out problems existed in the current postgraduate academic ethnic construction and analyzed main causes of academic misconduct. Finally， this paper introduced the success experiences of Chongqing Medical Uni-versity in preventing postgraduate academic misconduct from the aspects of system construction， propa-ganda and education， supervision in postgraduate training process， strict control of graduate thesis，etc.