The keys to control diabetic nephropathy are blood glucose control, blood pressure control, salt intake control and potassium and protein intake control. 1. Blood glucose control: Usually, the continuous elevation of blood glucose will lead to fat and cholesterol metabolism disorders and promote the thickening, hardening and degeneration of glomerular and renal capillary lining, which will cause them to lose their normal functions. The key to controlling blood sugar is to strictly limit calorie intake, followed by taking hypoglycemic drugs consistently and avoiding various factors that may lead to fluctuation of blood sugar. 2. Blood pressure control: usually elevated blood pressure will aggravate the condition of diabetic nephropathy patients, therefore, controlling blood pressure is also an important part of diabetic nephropathy prevention and treatment. 3. Salt intake control: in order to protect the kidneys, patients should reduce their workload. The diet of diabetic nephropathy patients should be as light as possible, and salt intake should be controlled every day, usually at 3~6 grams per day. 4. Potassium and protein intake control: As diabetic nephropathy is prone to acidosis and hyperkalemia. Once occurred, it may cause arrhythmia and coma, etc. Patients should also control potassium and protein intake. If the renal function of diabetic nephropathy patients develops below stage 3 of chronic kidney disease should also limit protein intake and require high quality protein. It is recommended that diabetic nephropathy should consult in hospital in time, actively treat under the guidance of doctors, and review regularly to avoid the development of the disease.