Tracheal foreign bodies are a common cause of accidental death in children, mostly in children aged 1 to 5 years old, and it is necessary for parents to know about them because of their sudden onset, rapid lesions and great danger. Common foreign bodies in the trachea include watermelon seeds, peanuts, sugar cubes, coins, soybeans, and some small smooth toys. Since foreign bodies can cause suffocation after completely blocking the trachea, more than four minutes will be life-threatening, and even if the rescue is successful, it often leaves serious sequelae. Therefore, first aid at the scene is very important. The following are a few easy to grasp rescue methods: 1, immediately insert a dental pad or similar dental pad substitute, open the mouth in order to discharge the foreign body from the mouth. 2, into the patient’s mouth into the index finger or a large cotton skewer, or toothbrush handle, straight to the pharynx, to stimulate its defensive deep breathing. 3.Try to make the patient increase the abdominal pressure in the upper abdomen to remove the foreign body from the trachea. (l) Rescuers stand behind the patient, hold the patient’s waist, use the root back of the right thumb to top the patient’s upper abdomen, fold the left hand over the right hand, intermittently squeeze the rescued person’s chest and abdomen with force, with the help of the diaphragm to compress the lungs and produce a gas rush to expel the foreign body from the trachea. (2) When the patient faints, he can lie on his back, the rescuer can kneel on the ground, facing the patient, spread his legs in his two measurements, lean forward, clench his right fist, place his right fist in the saber straight below, the left palm presses the right fist, and suddenly and quickly press the upper abdomen downward in the direction of the front. At this time, the patient may vomit out the stomach contents after heavy pressure, and at the same time, it is also possible to cough out the foreign body obstructing the trachea. In order to avoid re-aspiration of gastric contents, when coughing up foreign bodies should be made to lie on their sides. 4, if the patient is a child, the following three on-site first aid methods can also be implemented: (1) first aid rescuer: take a sitting position, let the child sit on the rescuer’s lap facing forward, then the rescuer uses the middle finger and index finger of both hands to squeeze the upper abdomen of the child with force to the top of the back, and then relax after pressing and repeat. (2) For older children, let them lie on the rescuer’s knees, head down, and pound their backs. (3) When there are two rescuers, one person can lift the child off the ground upside down, and one person can use his hands to pat his back and pull out his throat, so that foreign objects can be discharged quickly. All of the above methods are effective in on-site first aid, and most of them can be successful as long as they master the essentials and do not require special training. Of course, if unsuccessful, it should be sent to the hospital for resuscitation. In addition, if it is very convenient to go to the hospital, once the suspicion of a foreign body in the trachea can be immediately sent to the hospital rescue. In the case of children and adolescents, the patient can be immediately picked up on his side facing the person holding him, so that the head rests on the left arm of the person holding him. Such a hold can let the foreign body more smoothly into the thick and short right side of the bronchus, to avoid foreign bodies in the trachea up and down or long live, and let the right side of the bronchus blocked, so that the left side can move and breathe, to win time to hospital rescue. In conclusion, foreign body in the trachea is one of the critical illnesses, so we should seize the opportunity and give first aid as soon as possible to succeed. Otherwise, it can be life-threatening or leave serious sequelae.