Diabetic nephropathy, is one of the serious complications after unsatisfactory control of diabetes. Once the kidneys become dysfunctional, the lighter the blood pressure rises and the circumference is weak; the middle is reproductive dysfunction, swelling, impotence and testicular atrophy in men; the heavier the complete loss of self-care ability, and even the possibility of being taken away from life. Therefore, diabetic patients need to be highly alert to diabetic nephropathy, from the beginning should strengthen self-care and self-prevention, especially from the diet, to reduce the pressure on the kidneys. 1, blood sugar control to loss of importance. Sustained elevation of blood sugar will induce fat-cholesterol metabolism disorders, promote glomerular and renal capillary intima thickening sclerosis degeneration, so that it loses its normal function. The key to blood sugar control is to strictly limit caloric intake, secondly, to insist on taking hypoglycemic drugs, and thirdly, to avoid emotional excitement, infection and other factors that can cause blood sugar fluctuations. 2. Salt intake should be limited. In order to protect the kidneys, reduce its workload, diabetic dishes should be as light as possible, salt intake should be within 7 grams per day, severe renal failure should also limit the intake of water. 3, appropriate to limit the intake of potassium and protein. Because diabetic nephropathy is very easy to acidosis and hyperkalemia, once it occurs, will induce heart rhythm disorders and coma, so the intake of potassium-containing beverages, potassium-containing fruits c protein should be controlled at 0.6-0.8 grams per kilogram of body weight per day, and easy to digest fish, lean meat is better, because plant protein is not easily absorbed, will increase the burden on the kidneys. In addition, protein contains high potassium, control protein intake to a certain extent is also conducive to limit potassium. 4, intake of adequate vitamins, trace elements. Especially vitamin B, vitamin C and zinc, calcium, iron, etc., can play a protective role for the kidneys. Vitamin E can be used up to 11 international units per day, vitamin C 0.3 grams per day, they are slightly larger amount is not harmful. For kidney disease patients, in the process of treating kidney disease with doctors, they should strengthen the care of kidney disease and develop good living and eating habits in their lives.