Placenta praevia in third trimester is more serious and can cause postpartum hemorrhage, implantation of placenta, poor perinatal prognosis, etc., which needs to be paid attention to and strengthened monitoring, etc. If the placenta is attached to the lower segment of the uterus after 28 weeks of gestation, the lower edge reaches or covers the inner cervical opening, and the position is lower than the site of fetal prenatal exposure, it is called placenta praevia, which is one of the serious complications of pregnancy. Complications such as postpartum hemorrhage, puerperal infection, implantation of placenta, and poor perinatal prognosis can occur during and after labor and delivery in those with third trimester placenta previa. Therefore, triple placenta previa is still more serious and needs to be taken seriously, with enhanced monitoring, attention to rest, and avoidance of anal examination and unnecessary vaginal examination. Pay attention to the prevention and treatment of complications after labor and delivery, and if there is any discomfort, it is recommended to consult a doctor in time for consultation and treatment.