The utility model relates to a medical cooling bag, which belongs to the medical equipment. The utility model can be used for lowering body temperature of human bodies for clinic or family physic. The utility model is characterized in that the utility model is composed of a sealed bag and salt liquid which is charged in the sealed bag. The salt liquid in the sealed bag presents frost shape when the temperature is 18 DEGC below zero DEGC, so the sealed bag is soft, which makes people feel comfort. The utility model has the advantages of convenient operation, good cooling effect, and long duration.