When you find someone drowning, do not blindly go into the water to rescue, you can choose a wooden pole or rope to pull the patient to the shore, and then use the following methods to rescue the patient. Judgement of injuries: first judge the patient’s consciousness and breathing, check whether the patient has cardiac arrest; then observe whether there is any secretion in the patient’s mouth, if so, it should be cleaned up in time. Pre-hospital first aid: 1, quickly and carefully remove the patient from the water, immediately remove the sludge and debris in the mouth and nose, etc. 2, try the position to discharge the fluid in the lungs, which has no obvious effect on improving oxygenation; and there is a danger of misinhalation, delayed resuscitation or damage to the spinal cord, so it is not advocated. The patient should be made to lie on his side to prevent aspiration. Because it can be vomited at any time.3. Protect the cervical cord and observe any damage. The clues are paradoxical breathing, muscle flaccidity, abnormal penile erection or unexplained hypotension or bradycardia, loss of consciousness, trauma, giving cervical collars or sandbags, etc. 4, keep the airway open, oxygenation. If there is cardiac arrest, perform CPR at the scene.5. Monitor patients with hemodynamic instability.6. Call 120 and seek medical attention promptly.