If a diabetic patient’s blood sugar control is good, he/she can eat less longan meat, and if a diabetic patient’s blood sugar control is poor, it is not recommended to eat longan meat. The diet of diabetic patients is crucial as their insulin level is not high, which, if not controlled, can cause severe elevation of blood glucose in a hyperglycemic environment, which in turn can lead to a series of miscellaneous complications such as microangiopathy, neuropathy, and so on. Longan meat is dried from fresh longan, which retains most of the nutrients of longan and has a certain nutritional value, but it contains high sugar content, which, if ingested in excess, will lead to a significant rise in blood glucose, affecting the control of blood glucose. Therefore, diabetic patients with good blood sugar control can eat less, and diabetic patients with poor blood sugar control are not recommended to eat. Patients with diabetes need to actively go to a professional hospital, under the guidance of the doctor to avoid delays in treatment.