1, diabetes is the greatest danger to human health is to cause angina, heart attack, brain infarction and other atherosclerotic cardiovascular diseases. Therefore, for diabetic patients only lowering sugar treatment is far from enough. High blood sugar can destroy the endothelium of arterial blood vessels, causing endothelial damage and creating conditions for cholesterol to enter the walls of blood vessels. In other words, high blood sugar and blood cholesterol work together, leading to the formation and growth of atheromatous plaques. Actively and effectively reduce the level of cholesterol in the blood is the key measure to prevent the formation and growth of arterial plaque. 2, which diabetic patients need to use statin therapy? If a patient has had coronary heart disease, or even heart attack, brain attack, severe carotid or lower extremity stenosis, regardless of the high blood cholesterol level, statin therapy should be started immediately. 3, if the above-mentioned diseases do not occur, diabetic patients to occur while the risk of cardiovascular disease is also very high. If a diabetic patient’s age is 40 years or older and low-density lipoprotein cholesterol (LDL-C) reaches 1.8 mmol/L or higher, or total cholesterol reaches 3.1 mmol/L or higher, belong to the high risk of cardiovascular disease, should apply statin therapy to reduce cholesterol levels. Cholesterol is the raw material for plaque formation, the lower the cholesterol level in blood, the less likely to form arterial plaque, so the risk of cardiovascular disease will be significantly reduced. Therefore, diabetic patients should not only pay attention to lowering sugar, but also apply statin to lower cholesterol under the guidance of doctors. For some patients, lowering cholesterol is more important than lowering sugar.