Once a cesarean scar site pregnancy is diagnosed, termination is recommended. This includes pharmacologic and surgical treatment. Patients with stable vital signs can be treated medically, methotrexate is preferred for embryocide and blood HCG is monitored, but there is also a risk of uterine rupture of the scarred pregnancy during conservative treatment. Surgical methods include ultrasound-monitored evacuation of the uterus and hysteroscopic removal of the pregnancy. Uterine artery embolization is an important adjunctive treatment, and the thrombus begins to absorb 2-3 weeks after embolization and can be completely absorbed by 3 months, and studies have shown that uterine clearance after embolization is superior to drug therapy. For type II and III patients with deep implantation of the gestational sac, there is a risk of uterine perforation caused by uterine evacuation or hysteroscopic surgery, laparoscopic or open surgery or cesarean section scar lesion excision, and cesarean section scar lesion excision is feasible for type IV. For patients who still bleed a lot after medication or uterine artery embolization, patients who fail conservative treatment or uterine rupture, and patients with hemorrhage that cannot be controlled by conservative treatment, hysterectomy is feasible when necessary.