Erectile dysfunction, referred to as ED, or impotence as we used to call it, is currently defined as the inability to achieve and maintain an erection sufficient for satisfactory sexual intercourse. According to the Massachusetts Male Aging Study, the prevalence of ED in men aged 40-70 is 52%. Such a high prevalence rate greatly reduces the quality of life and becomes an important factor in family instability. Therefore, attention to men’s health, timely diagnosis and treatment of ED has extremely far-reaching significance. The causes of ED include psychological, organic and mixed, of which mixed is the most common cause, that is, both psychological and organic factors. For organic factors, the relationship between cardiovascular disease and ED is more certain, and the change in erectile function may be the initial manifestation of systemic atherosclerosis. Diabetes triggers vascular and neurological lesions, is also an important cause of ED. In addition, chronic liver disease, chronic renal insufficiency, hyperlipidemia and ED are also more closely related. Therefore, the appearance of ED should be given sufficient attention. ED treatment includes psychotherapy, drug therapy and surgery. Psychological factors caused by the young people, after giving guidance on sexual knowledge, psychotherapy and combined with drug therapy, basically can be cured. The organic factors and mixed factors caused by the middle-aged and elderly, should be given etiological treatment, sexual knowledge guidance, Chinese and Western medicine combined with drug therapy, penile cavernous body injection treatment can also receive significant results. For young and middle-aged people with organic lesions, drug treatment is ineffective, penile prosthesis surgery can be performed, and its 10-year success rate can reach 95%.