Diabetes mellitus is generally better treated by diet therapy, exercise therapy, and medication. 1. Dietary treatment: diabetic patients should control the total calorie intake, while controlling the total amount of carbohydrates, they should choose low-glycemic index carbohydrates, and can appropriately increase the amount of non-starchy vegetables, fruits, and whole grains, and reduce the intake of refined grains. Whole grains should account for more than half of the total grains. 2. Exercise therapy: regular exercise can increase insulin sensitivity, improve quality of life, help control blood glucose, reduce cardiovascular risk factors, and has a significant effect on the primary prevention of diabetes in high-risk groups. Exercise therapy for diabetic patients should be carried out under the guidance of relevant professionals. 3. Medication: Diabetic patients’ hypoglycemic drugs include oral hypoglycemic drugs and injectable hypoglycemic drugs, such as metformin, acarbose, insulin and so on. It is recommended that diabetic patients go to regular hospitals in a timely manner to improve the relevant examinations, and standardize the treatment under the guidance of the doctor to avoid delaying the condition.