”Impotence” (ED, erectile dysfunction) is defined as “the loss of the ability to obtain and/or maintain sexual intercourse sufficient to achieve satisfaction”. ED is an important complication of diabetes mellitus. A survey of more than 6700 male patients in mainland China showed that the prevalence of ED in diabetic patients was as high as 78%. Diabetic ED is the result of a combination of factors, the reason: 1, the impact of long-term hyperglycemia, dysregulation of glucose metabolism and vitamin metabolism disorders, resulting in the nervous system function is affected, nerve conduction is blocked, thus reducing sexual excitability; 2, diabetes caused by vascular sclerosis, when the small arteries involving the penile cavernous body, it can affect the erectile function of the penis; 3, high blood lipids can make atherosclerosis, once the wave of Once the penile arteries are affected, the blood vessels will be narrowed and the amount of blood supply will be sharply reduced, thus triggering the appearance of impotence; 4. Other factors: impotence in diabetic patients is not all caused by diabetes, some diabetic patients, because of the mental tension caused by the disease, the mind is very stressful, afraid that the lover will be disgusted, psychological pressure can also cause impotence. Diabetes itself, age and/or certain drugs can cause hypotension and ED. Diabetic ED prevention and control: establish an optimistic and positive character; quit smoking and alcohol; refuse drugs; prevent and control hypertension and hyperlipidemia; monitor the occurrence and development of atherosclerosis and diabetic autonomic neuropathy; do not abuse drugs; and go to a regular hospital for examination and consultation as soon as possible when signs of ED appear. Actively controlling blood sugar and minimizing the ongoing damage of diabetes to the blood vessels and nervous system are necessary to restore testicular function and normal sexual function in diabetic patients, and some patients can expect to maintain or naturally recover their fertility by relying solely on this method. Sexual psychotherapy, it is best to participate in both husband and wife to carry out, because: 1, sex is a joint participation of both husband and wife, can make the patient reduce psychological pressure, better and faster recovery; 2, sex is not only sexual intercourse, but also includes the two sides of the language exchange, caressing, kissing, hugging and other non-intercourse emotional communication, excessive attention to erectile function will lose the naturalness and pleasure of sexual life; 3, the emergence of ED is common, in no way means that there is no hope of cure, not to mention the generation of complaints, anxiety and dissatisfaction.