People with diabetes often have many chronic complications, and cardiovascular complications are by far the most common type of complication, including heart failure, also known as heart failure. Diabetic patients are prone to heart failure because diabetes is closely and directly related to a heart disease, namely coronary heart disease. In clinical practice, diabetes and coronary heart disease are called equivocal diseases, that is, the risk of coronary heart disease increases greatly in patients with diabetes, and in turn, the risk of diabetes increases greatly in patients with coronary heart disease, so these two diseases are typical equivocal diseases. As the most common heart disease at present, coronary heart disease, if poorly controlled, may lead to heart failure, also known as cardiac insufficiency, which will seriously affect the quality of life of patients, so diabetic patients should control blood sugar in a timely manner in order to avoid the occurrence of heart failure, and do a good job of comprehensive management of blood sugar, blood pressure and lipids in order to further prevent the occurrence of coronary heart disease and even heart failure.