The amount of fluid that should be replaced for postpartum hemorrhage depends on the amount of postpartum hemorrhage and the mother’s own physical condition and maternal weight. Postpartum hemorrhage is defined as bleeding greater than or equal to 500 milliliters for vaginal deliveries and greater than or equal to 1,000 milliliters for cesarean deliveries within 24 hours after delivery of the fetus. The first step is to quickly and accurately estimate the amount of blood loss, so that the amount of blood to be transfused can be effectively guided. The principle of postpartum hemorrhage transfusion is to quickly enter the crystalloid fluid first, and then transfuse the colloid fluid, generally within 45 minutes after entering the crystalloid fluid of about 1000 to 2000 ml, such as maternal blood pressure is relatively stable, and there is no further bleeding, red blood cell pressure accumulation of 30% or more, can consider not transfusing blood temporarily, continue to supplement the crystalloid fluid, generally speaking, the supplementation amount can be up to three times the amount of bleeding. Bleeding or bleeding is not controlled, rapid input of crystalloid 1000 ml should be considered to continue to input concentrated red blood cells, plasma, cold precipitation, etc. The amount of blood transfusion should be based on the actual clinical situation, and the conditions can be based on the central venous pressure and blood pressure measurement to guide the amount of transfusion. It is recommended that the patient under the guidance of a professional doctor to rehydration according to the needs of the condition.