After amputation, diabetic patients should ensure a balanced and comprehensive diet, eat foods rich in protein and vitamins, such as milk, boiled eggs, fresh fruits and vegetables, etc., and at the same time, maintain a low-salt, low-fat, low-sugar diet; they should also take regular medication to control blood glucose, such as metformin, acarbose, insulin and so on. After amputation, diabetic patients should take light food as the main focus, and also ensure that the diet is nutritionally balanced and comprehensive, which can help promote wound healing. The diet can choose protein-rich foods, such as milk, beans, boiled eggs, lean meat, fish, etc., as well as vitamin-rich foods, such as a variety of vegetables and fruits with lower glycemic index, such as apples and oranges. In addition to this, regular medication should be taken to control blood glucose, including glucose-lowering medications such as metformin, acarbose, and insulin, to maintain blood glucose within the target range. Diabetic patients after amputation should actively cooperate with the doctor’s treatment and maintain a healthy diet and lifestyle.