The invention discloses a blood transfusion bag capable of preventing blood coagulation. The blood transfusion bag comprises a plastic soft
film material layer, a
filter element structure is fixedly arranged at the upper end of the interior of the plastic soft
film material layer, and a blood inlet is fixedly formed in the upper end of the side, close to the
filter element structure, of the plastic soft
film material layer through a connecting piece; an
anticoagulant injection port is formed in the end, away from the blood inlet, of the upper end of the plastic soft film material layer through a connecting piece, an outer
protection layer is connected to the four corners of the outer side of the plastic soft film material layer through connecting pieces, a first hanging ring is fixedly arranged in the center of the upper end of the outer
protection layer, and an air inlet is fixedly formed in one side of the first hanging ring; an exhaust port is fixedly formed in the lower end of the outer
protection layer, an infusion pipeline is arranged in the center of the lower end of the plastic soft film material layer, a blood storage
pipe is fixedly arranged at the lower end of the infusion pipeline, and a first sealing
rubber ring is fixedly arranged at the bottom end of the blood storage
pipe. Therefore, the situation of blood coagulation during blood transfusion is effectively avoided, and the blood transfusion bag is suitable for being widely popularized.