The booster shot usually refers to the third shot of the new coronary vaccine. Whether a diabetic patient can have a booster shot depends on his or her blood sugar and his or her condition. If the patient’s blood glucose control is stable and his/her condition is good, he/she can have a booster shot. However, if the diabetic patient’s blood sugar control is poor, there are acute complications, such as diabetic ketoacidosis, etc., it is recommended that the vaccination be postponed. Patients with more stable glycemic control and better conditions of their own immune system function are more stable and can come for vaccination to prevent new coronavirus infections just like other normal people. However, if the diabetic patient’s blood sugar control is poor, and there are acute complications, such as diabetic ketoacidosis, lactic acidosis, etc., it is recommended that the vaccine be withheld, in order to prevent the patient from having fever, vomiting, and other adverse reactions after the vaccine is administered, which may exacerbate the diabetic patient’s complication, and the patient needs to wait for his blood sugar to be stabilized before being injected with the vaccine. Whether diabetic patients can be vaccinated with the new crown vaccine need to consult a professional doctor, do not blindly inject booster shots in order to avoid adverse consequences.