High blood sugar should firstly control the diet and reduce the daily total calorie intake of reasonable meals, with carbohydrates accounting for 50%-60% of total calories, protein intake accounting for 15%-20% and fat intake accounting for 25%-30%. Patients should eat more food rich in dietary fiber, which can delay food absorption, reduce the peak of postprandial blood sugar, help improve disorders of glucolipid metabolism, and can increase the feeling of satiety. In addition, patients should quit smoking and limit alcohol. Three meals per day can be allocated as 1/5, 2/5, 2/5 or 1/3, 1/3, 1/3 pattern, regular diet, regular ration, and do not eat foods with too much sugar and too greasy. In addition, exercise therapy, exercise especially for type 2 diabetics can increase the sensitivity of insulin and help control blood sugar. Be sure to adhere to regular exercise, gradual and long-term adherence. It is recommended that 150 minutes of moderate intensity exercise per week, and blood glucose should be monitored before and after exercise. If blood glucose still does not reach the standard based on diet and exercise control, further consideration should be given to applying glucose-lowering drugs or insulin for glucose-lowering treatment under the guidance of a doctor.