Clinically, it is not recommended for diabetic patients to drink large amounts of alcohol for the following reasons: 1. Drinking large amounts of alcohol can lead to an increase in blood sugar, but patients often eat small amounts of staple foods or do not eat staple foods in a timely manner, so blood sugar can be low, and in severe cases, hypoglycemic coma can occur. 2. Drinking large amounts of alcohol can lead to fatty liver, alcoholic liver and liver injury, which aggravates insulin resistance and is detrimental to the control of blood sugar. 3. Long-term heavy drinking can aggravate diabetic peripheral neuropathy, and patients often show irreversible nerve damage. So diabetic patients should drink alcohol in moderation, to be controlled within a safe range, white wine not more than 50ml per day, wine not more than 150ml, beer not more than 400ml, can reduce the impact on blood sugar, and at the same time to reduce the impact on related complications.