The main reasons for diabetic patients to appear urine sugar are as follows: 1, high blood sugar: when the patient’s blood sugar is too high, beyond the ability of the kidneys to reabsorb sugar, breaking the renal glucose threshold, it will lead to the appearance of glucose in the urine, urine routine test, you will find a positive glucose; 2, renal lesions: when the non-diabetic patients develop renal lesions, it affects the function of the kidneys on the reabsorption of glucose, there will be a positive glucose in the urine; 3, drugs Role: Dagliflozin and other new hypoglycemic drugs reduce blood glucose by promoting glucose excretion. In taking dagliflozin this kind of drug, for the treatment of diabetic patients, there will also be a positive urine sugar, at this time is not suggesting that the patient’s blood sugar is high, but the role of drug treatment caused by the drug, should pay attention to the distinction. The diagnostic criteria for patients with diabetes mellitus are still fasting blood glucose ≥7.0mmol/L, random blood glucose ≥11.1mmol/L, or OGTT test 2 hours later, blood glucose ≥11.1mmol/L, as the diagnostic criteria for diabetes mellitus. Glycosylated hemoglobin, as an indicator of diagnostic criteria, is also currently used, and diabetes can also be diagnosed with a glycosylated hemoglobin ≥6.5%.