Cesarean scar diverticulum（CSD）is one of the long-term complications after cesarean section. The clinical common symptoms are irregular vaginal bleeding，infertility，pelvic pain and other symptoms.The obstetric risks in re-pregnancy also concern the clinicians.This paper focuses on the classification of CSD，the assessment of reproduction risk and re-pregnancy of CSD，the prevention and related pregnancy risk of CSD，by combination with an expert consensus on the diagnosis and treatment of CSD in China in 2019. Our goal is to explore the classification, grading，re-pregnancy risk，reproductive analysis and prevention of CSD，so as to provide basis for clinical evaluation and treatment of this kind of disease.