Placenta praevia is a condition in which the placenta attaches to the lower part of the uterus, lower margin, etc., below the position of the fetal prenatal exposure after 28 weeks of gestation. Usually the fetus with placenta praevia can survive, but there are fewer cases where the fetus dies due to lack of oxygen. Placenta praevia is the most common cause of vaginal bleeding in late pregnancy. If placenta previa is detected in the middle of pregnancy, the principle of treatment is to suppress contractions, stop bleeding and correct anemia. In the presence of placenta praevia, it is generally advocated that the mother be placed in the lateral position and on absolute bed rest. Prohibit sexual intercourse, vaginal examination, anal examination, etc., and closely monitor the condition of the fetus through fetal heartbeat and fetal movement count. Prolong the pregnancy cycle as much as possible under the condition of guaranteeing the safety of the pregnant woman, and choose the appropriate way of delivery according to the doctor’s advice when the conditions for delivery are reached. Fetal death may also occur if there is heavy bleeding and signs of fetal distress, resulting in lack of oxygen to the fetus. When placenta praevia occurs, it is recommended to consult a doctor, follow the doctor’s instructions to choose the appropriate way of examination, and carry out targeted treatment or therapy with the help of the doctor.