Placenta implantation is rarely discussed. Because the lower part of uterus is thin, the incidence rate of pregnant women with placenta previa is as high as 5%. Any reason leading to decidual dysplasia/loss can lead to placenta implantation, such as endometrial damage; Intima inflammation; Placenta is abnormal (lower uterine segment, uterine horn, cervix-this part has thin endometrium). At present, abortion and curettage are important reasons for placenta previa and placenta implantation. Clinically, complete placenta implantation often leads to less bleeding, while partial placenta implantation is often accompanied by severe postpartum hemorrhage, which may even endanger the life of patients. Three cases of placenta implantation in this group were small in size, but all of them were complicated with severe postpartum hemorrhage, most of which reached 3500ml. In shock. In the author's opinion, it is feasible to scrape and locally wedge the implant while actively resisting shock for cases with small implants but massive bleeding. Intestinal suture is used to stop bleeding at the defect. For those who have been actively treated and the bleeding on the stripping surface is difficult to control, it is simple and effective to use intrauterine gauze to stop bleeding, which can avoid hysterectomy. For conservative treatment cases, we should actively prevent postoperative infection and promote uterine involution.