Cardiopulmonary resuscitation should first confirm whether the patient is conscious, and check whether the heartbeat and respiration exist, determine the respiration, heartbeat stopped and call the surrounding people to make an emergency call, and correct the patient’s position, so that the patient lies flat, double upper limbs on both sides of the body, untie the patient’s collar, belt, in turn, chest compressions, open the airway, artificial respiration and other operations: a. First aid steps: 1, chest compressions: the patient’s chest is completely exposed 1, external chest compressions: expose the patient’s chest completely, determine the compression site, i.e., the midpoint of the line between the two nipples, place the root of the palm of one hand on the compression site, overlap the root of the palm of the other hand on top of the former, straighten both arms, use the upper limb strength to press down vertically, the compression depth is 5-6cm, the compression frequency is 100-120 times/min; 2, open the airway: use the tilted head chin lift method, place the big fish interval on the patient’s forehead with pressure, make the head tilt back, the other hand index finger, middle finger Lift the patient’s chin, and quickly remove foreign objects (including dentures) from the mouth and nose, so that the patient’s airway is open; 3, artificial respiration: pinch the patient’s nostrils with the thumb and index finger of the hand placed on the patient’s forehead, take a deep breath and blow hard into the patient’s mouth, remove the finger and mouth after each blow, each blowing time should be > 1 s. After each 30 chest compressions, 2 artificial respirations should be performed, maintaining a 30:2 The frequency of waiting for the arrival of emergency personnel, or the recovery of the patient’s vital signs. Precautions: 1. Observe the patient’s respiration and heartbeat recovery at all times during the operation, and stop the operation after recovery; 2. The above steps should be continued 5-6 times and maintained until the patient’s respiration and heartbeat are restored or professional medical personnel arrive; 3. Strictly follow the above steps for standardized operation to avoid failure of first aid due to operation errors; 4. As the probability of broken bones piercing the heart and lungs is small, most of the fractures are in the rib cartilage close to the thoracic rib joints, at this time it is mostly necessary to continue compressions.