Moral injury is a kind of psychological and physiological trauma caused by the deviation of anti-moral behavior and events from the moral principles held by individuals or groups. Because it is a complex concept, involving ethics, culture, sociology and other disciplines. In the disaster situation, facing the complicated situation such as the changeable epidemic situation, high infection rate and many patients, medical workers are easily in conflict between internal ethics and external moral practice, and thus fall into the moral dilemma. The moral choice made in this situation, once triggered the unpredictable consequences, is easy to cause Moral injury to the individual. Based on this, we should strengthen the confidence to overcome the epidemic, discard the wrong moral cognition, and strengthen the moral resilience. Maintain good moral psychology.