1. Avoid giving peanuts, melon seeds and beans to children under 3 to 5 years old. Do not play with small toys and toy parts that can enter the mouth and nostrils. Do not suck jelly, chewing gum and other dangerous food. 2, do not laugh, cry, scold when eating, so as not to accidentally inhale foreign objects into the airway by deep inhalation. 3.Educate children not to play with objects in their mouths, if they have been found, they should politely persuade them to spit out, not to forcefully pick them out with their fingers, so as not to cry and inhale into the airway. Adults should correct the bad habit of working with objects in the mouth. 4, strengthen the care of comatose and unconscious patients, to prevent vomit inhalation of the lower respiratory tract, the active dentures should be removed. 5.Once a foreign body is accidentally inhaled from the respiratory tract, even if the condition is not serious, the patient should go to the hospital for examination and treatment, and the doctor can remove the foreign body through the endoscope. If the foreign body is inhaled immediately after asphyxiation, while actively contacting the hospital for emergency treatment, on-site first aid should be carried out immediately, such as mouth-to-mouth artificial respiration, rapid pressure on the upper abdomen (Heimlich) action, etc., which can be expected to lift the asphyxiation state or flush the foreign body out of the airway, but be careful to use the method of hanging the child upside down and patting the back.