Objective To investigate the knowledge of skin tear among geriatric nurses, and to analyze its influencing factors, so as to provide a reference for conducting relevant training. Methods A total of 286 geriatric nurses from three tertiary general hospitals in Wuhan were selected by convenience sampling, then they were investigated by using a general information questionnaire and the Skin Tear Knowledge Assessment Instrument. Results The knowledge score of geriatric nurses was (9.53±2.02), and the 5 items with the highest accuracy belonged to the subscales of special population, etiology, classification， and observation, while the other 5 items with the lowest accuracy belonged to the dimensions of prevention, treatment, and risk assessment. The main factors affecting the cognitive level of skin tear among geriatric nurses were educational background, working years, specialist nurses or not, and skin tear-related training (all P<0.05), which explained 31.7% of the total variance. Conclusion The knowledge of skin tear among geriatric nurses is at a medium or low level, and their cognition of clinical practice related prevention, treatment, and risk assessment is deficient relatively. It is necessary to strengthen relevant training to improve geriatric nurses′ attention to skin tear, then enhance the overall prevention and nursing level of skin tear.