Patients with renal insufficiency can generally eat sugar, except for renal insufficiency caused by diabetic nephropathy. Renal insufficiency refers to a series of clinical manifestations caused by a decrease in glomerular filtration rate due to various reasons, which is mainly manifested by water-electrolyte disorders, acid-base imbalance, and metabolite retention. Patients with renal insufficiency usually have a low-salt, low-fat and high-quality protein diet, i.e., less salty food such as pickles and kimchi, less fatty and greasy food, and a high-quality protein diet such as meat, eggs and milk, etc. If the patient has diabetic nephropathy, he or she will be treated as a diabetic kidney disease patient. If the patient is diabetic nephropathy caused by renal insufficiency, this situation to limit the intake of sugar, should be low-salt, low-fat high-quality protein and diabetic diet. Patients with renal insufficiency should go to the hospital in time to see a doctor and make a diet and medication plan under the guidance of a professional physician.