Postpartum hemorrhage is defined as bleeding more than 500 ml after delivery or more than 1000 ml after cesarean section within 24 hours after delivery, and is a serious life-threatening complication of labor, mainly due to weak uterine contractions, placental factors, soft birth canal laceration and coagulation dysfunction, among which weak uterine contractions are the most common. These causes often do not exist independently, but can co-exist, interact or be causal. The symptoms of postpartum hemorrhage are closely related to the cause of hemorrhage, the amount of blood loss, and the rate of blood loss. The main manifestation is vaginal bleeding after delivery of the fetus and placenta. Excessive blood loss may lead to shock and anemia symptoms, such as dizziness and weakness, pale face, mental agitation, and cold extremities. The diagnosis is based on the amount of blood loss within 24 hours after delivery of the fetus. The key to diagnosis is the correct measurement and estimation of the amount of bleeding and the accurate initial determination of the cause of bleeding, which can guide the correct initial management and treatment. Patients with postpartum hemorrhage are mainly treated with drugs that promote uterine contractions and hemostatic drugs, while care should be taken to avoid infection. Uterine contraction is the first-line drug for the prevention and treatment of postpartum hemorrhage, and is mainly administered by injection. In addition, prostaglandin preparations can also be applied, and commonly used drugs include misoprostol and carboprost aminotriol. When conventional pharmacological treatments such as contraction agents fail to stop bleeding, the hemostatic drug tranexamic acid may be used. To prevent infection, adequate antibiotics are usually given. In patients in whom pharmacological treatment methods are ineffective, surgical treatment should be performed in cases where it is difficult to stop bleeding, such as uterine cavity tamponade, uterine compression suturing, and pelvic vascular ligation. In addition, mothers should pay attention to the ventilation of the environment, avoid catching cold and flu, pay attention to personal hygiene during the puerperium, wash the perineum in time to avoid bacterial infections, change tampons or sanitary napkins and other personal necessities, pay attention to regular observation of the malignant dew, prevent late postpartum hemorrhage, and seek medical attention in time for reissue of blood.