Tranquility, as a positive psychological resource, enables nurses to maintain emotional stability and enhance humanistic caring abilities in high-pressure clinical environments.This review systematically synthesizes domestic and international studies on nurses′ tranquility, focusing on measurement instruments, influencing factors, and intervention strategies.It aims to strengthen the localized interpretation of the concept of tranquility, develop measurement tools conforming to the cultural context, and explore diversified intervention paths, so as to provide references for optimizing the mental health support system for nurses, improving nursing quality and promoting the sustainable development of the nursing profession.