I. Definition: Erectile dysfunction (ED), commonly known as “impotence”, is defined as the persistent inability of the penis (in the past 3 months) to achieve and/or maintain sufficient erectile hardness for satisfactory sexual intercourse. 52% of men aged 40-70 years have varying degrees of ED, and it is estimated that a total of 152 million men worldwide suffer from ED; by 2025, the number of men aged 40 years and above will increase to 322 million. A total of 152 million men worldwide suffer from ED; by 2025, the number of men with ED will increase to 322 million; in China, the prevalence rate for people aged 40 and above is 40.2%. According to this projection, the number of men with ED in China’s urban population is about 26 million, and is still in a growing trend. Second, the classification: the causes of ED there are three main: organic, psychological and mixed. 50 years of age or older ED patients, 80% of organic ED. organic ED causes more complex, can be subdivided as follows: vascular factors, the penis itself, neurological factors. Psychological ED mainly comes from the mental stress of sexual behavior, bad sexual experience, lack of sexual knowledge, etc.. Mixed ED for the combination of psychological factors and organic factors. Third, the grading: 1, penis enlargement, but not erection, 2, penis erection, but not hard enough to insert, 3, penis hardness can be inserted but not fully firm, 4, penis fully erect and firm. The consequences of neglect Untreated ED does not lead to death, but it greatly reduces the quality of life of men and their partners. ed can also lead to depression, lack of self-confidence or other mental problems in men. More importantly, the presence of ED may be a warning sign that the body has other hidden diseases. Such as hypertension, diabetes, cardiovascular disease, atherosclerosis and other vascular pathogenesis of the same factors, ED is likely to manifest itself as a precursor to these diseases. Fifth, the treatment of ED – the Chinese Medical Association Urology Branch guidelines recommend 1, basic treatment: correction of risk factors such as smoking and alcohol cessation, strengthen the treatment of the original disease, adjust the psychological state. 2, first-line treatment: oral drug therapy represented by PDE5 inhibitors (such as sildenafil, etc.). 3.Second-line treatment: vacuum negative pressure erection device, intracavernosal drug injection, transurethral drug therapy. 4.Third-line treatment: penile prosthesis implantation, vascular surgery.