The harm of placental abruption is mainly manifested in the maternal and fetal aspects, which can seriously endanger the lives of the mother and the fetus, if placental abruption is found, it should be treated as soon as possible. 1, maternal: due to placental abruption, it will form an open stripping surface between the mother and the placenta, amniotic fluid can enter the blood circulation through the open stripping surface, causing coagulation dysfunction, which will then lead to renal failure, weak uterine contraction, pre-eclampsia, uteroplacental stroke and postpartum hemorrhage, etc. Serious cases may cause diffuse intravascular coagulation, amniotic fluid embolism, etc., endangering maternal life; 2. Fetus: As the placenta abrupts from the uterine wall, blood exchange between the mother and the placenta is not possible, resulting in the loss of blood supply to the fetus and causing the fetus to suffer from hypoxia. If the abruption surface is small, the placenta can continue to support the growth and development of the fetus. If the detachment surface is large, it can cause neonatal ischemic-hypoxic encephalopathy, neonatal asphyxia, and in severe cases, fetal death in utero. In the distant future, it can cause serious sequelae such as neurological developmental defects and cerebral palsy. Therefore, the degree of placental abruption is more serious. When a pregnant woman has placental abruption, she should go to the hospital as soon as possible and take appropriate measures to replenish the coagulation factors in time or ensure the safety of the pregnant woman through blood transfusion. Depending on the duration and condition of intrauterine distress, conservative treatment or cesarean section if necessary will be performed to terminate the pregnancy.