Cardiac arrest requires first aid, in the absence of rescue equipment, we can only carry out cardiopulmonary resuscitation (CPR), chest compressions 30 times in the shortest possible time, blowing twice, can be done continuously for 5 cycles, resulting in the drowning person to regain consciousness to be considered as a successful rescue, so the popularisation of the importance of CPR training to cope with the unexpected time, as well as emergency first aid have a certain role. Drowning first aid simulation operation link, can help the trainer in the encounter sudden ‘drowning incident’, how to carry out self-rescue and rescue others methods and measures, so as to achieve the ‘safety rescue’ purpose. According to the symptoms and signs of the drowning victim, it is possible to accurately determine the duration of the drowning, so as to take appropriate rescue measures. Drowning refers to the human body is submerged in water, due to the respiratory tract is blocked by water or produce laryngeal spasm caused by asphyxiation and lack of oxygen in severe cases can be due to respiratory and cardiac arrest and death. Drowning is often triggered by accidental falling into the water, mistakenly entering deep water while swimming, and sudden muscle spasms while swimming. Drowning symptoms are related to the duration of drowning. If the drowning lasts for a short time, the person is clear, pale and fearful, the skin is mildly cyanotic, and the heartbeat and breathing are normal.