How long one can live with a gangrenous ulcerated diabetic foot should depend on individual circumstances. If the treatment is not effective and serious consequences such as sepsis and infectious shock occur, it may be life-threatening in a short period of time; if the treatment is timely and effective, it may not significantly affect the life expectancy. Diabetic foot gangrene ulcers may improve prognosis or even not significantly affect life expectancy if treated aggressively, including anti-infection, clearing and changing, controlling blood glucose, improving circulation, nutritive nerves, and even amputation and other treatments. If diabetic foot gangrene ulceration is not actively treated, the occurrence of bacteremia, sepsis, sepsis, infectious shock and other serious consequences will endanger the patient’s life in a short period of time. Diabetic foot is highly lethal, and diabetic foot is one of the main causes of loss of limbs in diabetic patients, it is necessary to actively go to the hospital and standardize the treatment under the guidance of the doctor.