The correct method of physical cooling includes ice packs, ice water enemas, ethanol baths, ice caps and ice blankets. ⒈ ice cooling: mainly the use of cold towels scrubbing or ice packs placed directly on the neck, forehead, groin, armpits and other parts of the operation can be completed. Peck ice enema cooling: the doctor to prepare enema equipment and 4 ℃ saline, the use of enema equipment will be 200 ~ 500 ml of 4 ℃ ice water through the anus for irrigation, irrigation speed is 15 ~ 20 ml / min, 1 ~ 2 minutes and then repeat the above operation, the body temperature can be normal. For intestinal injury, such as intestinal perforation, this operation should be disabled. ⒊乙醇擦浴降温：Using 25%～35% ethanol to scrub the armpits, groin, neck can complete the operation, if the operation process of skin allergies, should be stopped immediately, and take appropriate measures. For ethanol allergy patients should be prohibited from this operation. Pregnant women are not recommended to use this method of cooling. Singing Ice Cap and Ice Blanket: First, put the ice cap on the patient’s head and place the patient on the ice blanket to lie down, this operation can be completed, but it should be noted that the ice should not be applied for too long to avoid causing frostbite. If the patient needs physical cooling, it should be done under the guidance of a doctor to avoid adverse effects.