First aid measures for foreign bodies in the tracheobronchial tubes, parents need to be prepared is best. The main prevention, 1-3 years old children eat as few nuts as possible. If choked how to do, small infants is to hold him in the hand, for example, in the left hand, prone position to hold, head down, legs slightly up, this time the mouth with the two fingers in front of the top open, with the palm of the right hand in the back to push three times, the foreign body of a small child can be pushed through the process of pushing, choking and coughing out. For older children or adults, the Heimlich maneuver is required. The main Heimlich maneuver is to hold the patient from behind, make a fist with the left hand, hold the wrist of the left hand with the right hand, put the fist of the left hand against the lower sternum, which is the place where the heart fossa is usually talked about, then let the patient’s upper body lean forward slightly, and press his abdomen backward with both hands at the same time, pressing hard for two or three times, which may also cough out the foreign body through the change of pressure in the chest cavity, which is a common first aid measure.