Abstract:The increasing aging population in China poses a challenge to the society that the proportion of elderly patients being hospitalized and undergoing surgery is on the rise year by year. The physiologic condition of the patients, underlying diseases and the abdominal operation are the main risk factors for the high incidence of postoperative acute kidney injury and the high mortality due to postoperative acute kidney injury in the elderly. Early diagnosis and intervention may reap long-term benefits in preventing acute kidney injury after abdominal surgery in elderly patients and alleviating the burden of health care costs on the family of the patients and the society. This paper expounds how to reduce the incidence of acute kidney injury after abdominal surgery in elderly patients and how to achieve the early diagnosis of acute kidney injury.