After delivery of large placental implantation, attention should be paid to contractions, vaginal bleeding, monitoring of blood HCG level and uterine recovery. 1. Uterine contraction: Placenta implantation refers to a group of diseases in which the placental tissue is implanted into the myometrium. For women with massive placental implantation, it is necessary to pay attention to uterine contraction and vaginal bleeding after delivery, and to follow the doctor’s instructions to give medications to promote uterine contraction, in order to facilitate the closure of the vascular openings of the placental detached surface, which will reduce post-partum vaginal bleeding. 2. Vaginal bleeding: due to the history of placenta implantation, we should pay attention to the observation of vaginal bleeding after delivery. When the amount of vaginal bleeding increases suddenly, we need to go to the hospital in time, and give prompt treatment to promote uterine contraction and rehydration therapy, and blood transfusion is needed if necessary. 3. Monitoring blood HCG (human chorionic gonadotropin) level: Due to the large placental implantation, blood HCG level should be monitored after delivery to find out whether there is any viable placental villi, and drugs such as mifepristone should be given according to the doctor’s instruction, and blood HCG level should be monitored continuously. 4. Uterine recovery: ultrasonography should be carried out 2 weeks after delivery to understand the recovery of the uterus and the placenta, and when there are blood flow signals in the residual tissue, it is necessary to give mifepristone and other medications as prescribed by the doctor in time, and it can be supplemented with traditional Chinese medicine treatment.