The treatments for old rotting feet in the elderly include disinfection, debridement, anti-infection, surgical treatment and amputation. When old rotting foot occurs in the elderly, the first thing to do is to disinfect and debride the wound repeatedly, which can be done with povidone-iodine, saline and hydrogen peroxide, and the fresh granulation tissue will be exposed after removing the necrotic and contaminated tissues and so on, and only in this way can it promote the growth of the granulation tissue and prevent the infection from aggravating. Alternatively, antibiotics such as piperacillin and amoxicillin can be given to fight infection. If severe infection occurs in local tissues, deep incision and drainage, negative pressure drainage, etc. are feasible. Amputation should be given in case of severe foot necrosis. At the same time, it is also necessary to clarify the specific causes of old rotting feet, if it is caused by diabetes or peripheral vascular neuropathy, according to the primary pathology of the treatment, including the control of blood glucose and so on. If the diagnosis is confirmed as old rotting feet, it is recommended to carry out standardized treatment as early as possible in order to reduce the adverse effects of the disease.