Safety knowledge of preventing drowning. First, measures to prevent drowning 1, primary school students should swim under the guidance of adults and learn to swim. 2. Don't play alone by the river or the mountain pond. 3. Don't go swimming in the non-swimming area. 4, can't swim, don't swim to deep water, even with a lifebuoy is not safe. 5. Make proper preparations before swimming to prevent cramps. Second, the self-help method when drowning: don't panic, find someone around you, and call for help immediately. 2. Relax your whole body, let your body float on the water, head out of the water, kick the water with your feet to prevent physical loss and wait for rescue. When your body sinks, you can press your palm down.