Lychee has no hypoglycemic effect and efficacy, it is recommended to apply hypoglycemic drugs reasonably under the guidance of a doctor. Lychee is a relatively common fruit, rich in vitamin A, vitamin C, vitamin B, folic acid, arginine, tryptophan and other nutrients, moderate consumption can be supplemented for the body’s nutrients and energy, so both healthy people and diabetic patients can eat lychee. However, lychee can not play the purpose of lowering blood sugar, excessive consumption of lychee may also cause an increase in blood sugar; need to lower blood sugar patients should follow the doctor’s instructions to use metformin, acarbose and other hypoglycemic drug therapy, good dietary management, with appropriate exercise. Patients with high blood sugar should be under the guidance of a doctor to standardize the treatment, food alone can not play a therapeutic purpose.