Abstract: With the prevalence of Intensive Care Unit (ICU) in the whole country, the mortality of critically ill patients has been significantly reduced. However, because of the large number of monitoring equipment and new medical equipment used in the clinical practice, there has a phenomenon of frequent alarm instrument in the ward, which is easy to cause alarm fatigue. This phenomenon can not only affect the medical staff's physical and mental health, but also be a serious threat to the life safety of patients. This paper reviewed the concept of ICU alarm fatigue and its reasons, hazards and prevention strategies.