The golden four minutes refers to the patient in cardiac arrest within four minutes of cardiac arrest, immediately start effective resuscitation measures, effective CPR is the best time to save the patient, help the patient to restore breathing, restore heartbeat, restore consciousness. The longer the time beyond four minutes, the lower the chances of CPR for the patient, especially if he or she is prone to a vegetative state of brain death. When it comes to the need for CPR resuscitation, you should immediately determine whether the patient needs CPR by consciousness, breathing and heartbeat, and if you need to start resuscitation immediately and get effective resuscitation within the golden four minutes, the patient’s chances of survival will be greatly increased. By tapping the patient to determine whether there is loss of consciousness, to determine whether there is breathing, and by the pulsation of the aorta to determine whether the heartbeat has stopped.