Men with high blood sugar can have children, but it is recommended to control blood sugar within a reasonable range before preparing for pregnancy. Because high blood sugar may affect the male sexual function, resulting in impotence, premature ejaculation and other symptoms, may also affect the quality of male sperm, and may even cause male infertility. Therefore, patients with high blood sugar are advised to control their blood sugar within a reasonable range before preparing for pregnancy. In daily life, men with high blood sugar should be treated with dietary control, proper exercise, and taking hypoglycemic drugs such as acarbose or insulin injection as prescribed by the doctor. Men diagnosed with hyperglycemia should cooperate with doctors for active treatment and regulate blood sugar control before having children.