Comparing the incidence of patient safety accidents in the recent three years, we found that the occurrence of abnormal events in hospitals and various medical treatment, medical technology and nursing units improved year after year after implementing personnel management, improving the environment for medical treatment, education and training, safety concept and shift scheduling. As for falling accidents, why are they still not effectively reduced? We speculate that high turnover rate of nursing staff, delayed replacement of the urgent, the patient's own consciousness, or the patient's physical strength and other problems may be the cause of the accident.