In clinical work, we find that most diabetic patients have had the disease for several years or decades, and only had fasting glucose and urine glucose tests, and then they think that diabetes has been diagnosed and start taking hypoglycemic drugs, which is actually wrong. Modern medicine believes that diabetes is a disorder of endocrine metabolism. It is a disorder of sugar, lipid spinning and protein metabolism caused by relative or absolute insulin deficiency. The increase in blood glucose and urine sugar is only the standard of diabetes, but the root of it is “low islet function”. Therefore, the objective indicators for diagnosing diabetes are insulin release test, C-peptide excitation test, and insulin receptor binding rate if possible. These tests can determine whether diabetes is type 1 or type 2, whether the disease is stable or not, whether the disease is mild, moderate or severe, and play an important role in guiding treatment and prognosis. It is important to note that the glucose tolerance test, insulin release test and C-peptide excitation test should be done at the same time. This will facilitate diagnostic and control observation, to understand exactly the condition and avoid misdiagnosis and mismanagement. In addition, the amount of urine sugar is controlled by the renal sugar threshold, and the urine sugar is often not proportional to the blood sugar in pathological cases. Some patients use the number of urine sugar “+” as the basis for adjusting the dose of hypoglycemic drugs and insulin based on the examination is very dangerous. The diabetic patients are looking for effective hypoglycemic drugs, and once they hear which drug can lower their blood sugar in the fastest time, they think it is a good drug. The use of glucose-lowering drugs can only control blood glucose, but cannot fundamentally restore the function of the pancreas. The use of glucose-lowering drugs is only a method of treating the symptoms. There are two main types of glucose-lowering drugs commonly used in clinical practice, one is sulfonylurea and the other is biguanide. Sulfonylureas mainly stimulate insulin secretion, which can temporarily lower fasting blood sugar. The postprandial blood glucose is the main manifestation of diabetes, so some patients see the normal fasting blood glucose, they mistakenly think that the disease has been controlled, in fact, the function of the pancreas is not improved. The glycemic agents of biguanide are effective in reducing postprandial glucose in mild obesity type diabetes. However, the mechanism is to inhibit the absorption of sugar in the body, just like dieting. The nutrition of human organs originates from food, if the food taken into the body can not be absorbed and used by the body, in the long run, it will lead to a decrease in physical fitness, pancreatic secretion function, or even failure. Diabetic patients have a lack of nutrition in all organs of the body, mainly due to general weakness, especially in the lower extremities. The main reason for this is that the nutrients in the diet are not absorbed and used (mainly sugar), plus the artificial control of the diet, resulting in the lack of nutrition, which is already inadequate, so that long-term not only diabetes itself can not improve, other internal organs such as the heart, liver and kidneys and other important organs will also produce lesions due to insufficient nutrition. A normal diet should be good in the morning, full at noon and little at night. In addition to avoid eating sugar, diabetic patients should especially eat more millet flour products. General white flour, rice, eggs, milk, meat, ribs soup, etc. can be eaten, poor kidney function should eat less soy products, fruit in the morning, noon, diabetes patients should also avoid eating chili, white wine and other stimulating food. In addition, peanut rice should also be eaten less, because it is easy to aggravate the fatty liver. The diabetic patient should advocate scientific and reasonable appropriate exercise, should not be excessive and form strain. Especially diabetes combined with cardiovascular disease should not be forced to exercise, otherwise it will be contrary to the wishes. You should not feel tired during and after exercise. Scientific and reasonable exercise can help diabetic patients recover as soon as possible.