After drowning, the first thing to do is to keep your mind calm, and you can save yourself by holding your knees and floating on your back. 1. knee-holding style: hands around the knees, while lowering the head into a huddle, when you feel the back upward floating away from the water, with the help of the floating force to raise their heads to change the air, change the air and then return to the state of knee-holding, according to their own respiratory length of the cycle of repeated actions, can be achieved to prolong the purpose of the time of self-rescue. 2. Yang floating style: let the face of the body float out of the water, the rest of the body does not do the action underwater to maintain buoyancy. Put your hands in the water, lean back, and keep your face on the surface of the water for a slow change of air. If you start to sink, use your nose to breathe out and your palms to slowly push the water and wait to float. Need to be reminded to look after the children at home, summer is coming, to do a good job of safety education. Do not swim in the water without safety facilities, no rescue personnel; get ready before going into the water, warm up in advance in advance; feel unwell in swimming, should immediately go ashore to rest or call for help.