Drowning, also known as drowning, is often caused by muscle convulsions while swimming, first aid measures are as follows: 1, try to make their mouth and nose exposed to the water, the first witness to start the emergency rescue procedures at the scene, it is recommended to rescue drowning people as far as possible on shore rescue, the use of tools rescue, group rescue; 2, drowning people carried to the shore in a safe environment, the first observation of the presence of heartbeat, breathing, the presence of heartbeat breathing to take a lateral position, keep respiratory tract unobstructed, waiting for the arrival of professional rescuers; no heartbeat respiratory, immediately carry out cardiopulmonary resuscitation, follow the procedures of opening the airway, cleaning the oral foreign body, chest compressions, artificial respiration, and as soon as possible electric defibrillation, cardiopulmonary resuscitation.