Coffee is generally not beneficial to people with type 2 diabetes, and excessive consumption may also affect blood glucose levels and the effectiveness of hypoglycemic drugs. Type 2 diabetes is generally due to insufficient insulin secretion or insulin resistance, and blood glucose control generally requires the use of exercise, dietary control and drug therapy and other comprehensive measures. Coffee, as a food, has no therapeutic effect and cannot replace the hypoglycemic effect of drugs. The coffee currently on the market has a high glycemic index, and drinking too much of it may cause an increase in blood glucose, which is not conducive to blood glucose control. In addition, some patients with type 2 diabetes need to take long-term glucose-lowering drugs such as metformin, acarbose, etc. Excessive consumption of coffee may also affect the absorption of the drug, thus affecting the efficacy of glucose-lowering drugs. Diabetic patients such as self-measurement of blood glucose fluctuations, etc., should consult a doctor in a timely manner, under the guidance of a professional physician, standardized drug-lowering treatment, do not stop taking medication without authorization, change the treatment plan.