The principles of first aid for heat stroke are: 1. Immediately get out of the hot, hot, humid and hot heat stroke environment and make the patient pan to a cool, dry and ventilated environment for treatment. 2. The principle of first aid is to immediately remove clothing from the patient’s body, such as tight clothes or wet clothes, and choose dry and loose clothing. 3. Immediately carry out rehydration therapy, and glucose saline can be chosen for rehydration. 4. Immediately carry out monitoring, such as electrocardiography, blood pressure, pulse pulse, urine volume, oxygen saturation, blood gas analysis, etc. 5. Finally, cryotherapy and sub-cryotherapy are feasible. Ice saline enema, static point or application of ice saline can be applied for physical cooling, such as wiping on the body aorta, forehead, neck, trunk, which is the use of the principle of evaporative heat dissipation for skin cooling.