Indications for cardiopulmonary resuscitation (CPR) are acute respiratory and cardiac arrest, or acute respiratory arrest with pulseless electrophysiologic activity of the heart, or pulseless ventricular fibrillation or ventricular flutter, due to a variety of causes and diseases. In all these cases, respiratory and circulatory failure and cessation have occurred, and the whole body is in a state of ischemia and hypoxia, and will die soon. Clinically, the main manifestation of the patient’s sudden loss of consciousness, and touch the carotid artery pulsation disappeared, and there is no rise and fall of the thorax, usually can be judged that his breathing, heartbeat has stopped, should be given CPR immediately. Chest compressions can restore the circulation of the whole body by pressing the chest. Artificial respiration can improve the hypoxic state of the body, which is a necessary method to rescue acute respiratory and cardiac arrest.