Blood transfusion bag

The utility model relates to a blood transfusion bag, which comprises a blood storing bag and a hanging hole. The upper portion of the blood storing bag takes a circular arc shape, and two lateral angles on the lower portion take circular arc shape, and scales for indicating blood flow volume is arranged on a bag body of the blood storing bag. The lower portion of the blood storing bag is connected with an injection tube and two blood transfusion tubes. The blood transfusion tubes comprise plastic flexible pipes on the lower portion of the blood storing bags, and control valves which are arranged on the plastic flexible pipes, the tail ends of the plastic flexible pipes are connected with puncture heads, and the lateral surface of the plastic flexible pipes are connected with puncture caps. Partial blood in the four corners of the bag can not be left after the utility model is transfused, and blood can not be wasted. Blood in the bag can not contact with the outside world in the whole process of blood transfu