The prevention of diabetes requires the following: First, a lifestyle of quitting smoking, limiting alcohol, eating less, moving more, and avoiding a high-calorie, high-fat, high-sugar, and high-sodium diet. Avoid refined processed foods to prevent weight gain due to increased calorie intake, which also tends to increase the functional burden of pancreatic beta cells. Second, maintain regular and effective exercise exercise can enhance physical fitness, increase total calorie consumption and avoid weight gain. Exercise can also improve insulin resistance and enhance insulin sensitivity. Third, maintain an ideal body weight and avoid obesity. Obesity is the basis for the occurrence of insulin resistance, and insulin resistance is an important cause of the onset of diabetes, avoiding obesity can delay the occurrence of diabetes. Maintain normal blood lipids, blood pressure and blood uric acid. Five, regular review, especially patients older than forty years old need to regularly review blood glucose, glycosylated hemoglobin. Especially for people at high risk of diabetes, the review time should be shortened.