Abstract: Radiation-induced skin fibrosis is a late effect of radiation-induced skin injury. It is a common complication of tumor radiotherapy and radioactive nuclear accidents, which seriously affects the life quality of patients. Radiation-induced skin fibrosis is characterized by changes in skin appearance, loss of skin elasticity and contracture, hard skin and difficult to pinch creases, which may be accompanied by capillary dilatation, pain and itching. Some patients may even develop progressive fibrosis and recurrent skin infections. However, the mechanism of radiation-induced skin fibrosis is not completely clear at present, and there are no effective drugs and therapies to prevent or mitigate this disease. Therefore, it is particularly important to explore the mechanism of ionizing radiation-induced skin fibrosis and find more effective prevention and treatment methods. This article reviews the influencing factors, clinical manifestations, mechanism and treatment of radiation-induced skin fibrosis, and prospects its development, aiming to provide a reference for the research of radiation-induced skin fibrosis.