Adult cardiopulmonary resuscitation precautions are mainly the following: 1, the pressure site, posture must be standard, the pressure site is the midpoint of the line between the two sides of the nipple, posture with the palm of the palm of the root of the hand pressure, hand, shoulder and elbow joints taut, vertical pressure; 2, the speed of compression should be fast, in 100-120 times / min; 3, the depth of compression required to be in the 5-6cm; 4, compression is continuous, can not be interrupted; 5, each time to make each compression to make the thorax rebound sufficiently, and then carry out the next compression.