The clinical medical term for drowning is drowning. After drowning, the patient should first be removed from the drowning environment and can be rescued from the water with a long board or other floating device, while paying attention to their own safety to avoid inadvertent falling into the water, after which shore first aid and in-hospital first aid should be performed as soon as possible. First aid ashore: call 120 immediately after going ashore, assess the drowning patient’s consciousness, tap the drowning patient’s shoulders first, and shout. Also carry out water control, put the patient’s face down, body pad on the legs, pat the back and try to control the water out. Check the patient’s breathing and pulse, touch the carotid artery with your hand, i.e., two horizontal fingers next to the laryngeal node, and observe whether the patient has a rising and falling chest. If there is no respiratory heartbeat, cardiopulmonary resuscitation should be performed immediately.1. Open the airway: first remove the sludge and weeds from the mouth and nose to keep the airway open. If there is vomiting, the head needs to be tilted to the side and vomit removed with fingers or towels; 2. Establish ventilation: ensure that the surrounding air is circulating so that the drowning person is supplied with oxygen. Pinch the nostrils of the drowning person with two fingers and blow mouth-to-mouth for 2 times continuously; 3. External chest compressions: lift the collar and belt of the patient, place the root of the palm of the hand at the midpoint of the line between the two nipples, cross and overlap the ten fingers of both hands, with both arms vertical, and press downward with the body for 5-6 cm, no less than 100 times per minute until the arrival of emergency personnel, while paying attention to keeping warm. Second, in-hospital first aid: the patient can use negative pressure suction to suck out the foreign body in the mouth after arriving at the hospital. If the patient has spontaneous breathing, pure oxygen inhalation needs to be given immediately, and tracheal intubation or non-invasive mask can also be used for ventilator-assisted ventilation. Intravenous access is also established immediately to maintain water-electrolyte and acid-base balance. If neck trauma is suspected, attention should be paid to cervical spine immobilization. Actively prevent and treat infection and prevent complications such as cerebral edema, cerebral failure, and acute respiratory distress syndrome.