Male sexual dysfunction refers to abnormalities in one or several of the five stages of sexual activity, including sexual desire, penile erection, intercourse, orgasm, and ejaculation, or the entire stage, that interfere with the normal performance of sexual activity. The most common male sexual dysfunction is abnormal penile erection and ejaculation. Male sexual function is a complex physiological process, involving various aspects, such as neurological, mental factors, endocrine function, sexual organs, etc., of which the sexual conditioned reflexes of the cerebral cortex plays a particularly important leading role. It can be seen that the causes of male sexual dysfunction is also multifaceted, overall can be divided into two categories of functional sexual dysfunction and organic sexual dysfunction, the former accounts for the vast majority of sexual dysfunction, while the latter is quite rare. Clinical performance 1, sexual desire disorder: including sexual indifference, sexual aversion, hypersexuality, etc. 2, penile erectile dysfunction: including impotence, penile erectile insecurity, abnormal penile erection, etc. 3, sexual intercourse disorder: including sexual fainting, sexual aphasia, sexual hysteria, sexual phobia, etc. 4, ejaculation disorder: including premature ejaculation, seminal emission, non-ejaculation, retrograde ejaculation, painful ejaculation, hemorrhage, etc. Although there are the above four aspects, can appear alone, but also more than one at the same time, called mixed sexual dysfunction, because there are common pathogenic factors. Examination 1, general examination: including general condition, cardiovascular, nervous system, and genitourinary system examination, etc. 2.Laboratory examination: blood and urine routine, blood sugar, blood lipid, liver, kidney function and endocrine hormone, prostate fluid and other examinations. 3.Special examination: including nocturnal penile distension test, penile artery blood pressure index, penile cavernosal injection vasoactive drug test. Color dual-function ultrasound, cavernosography and manometry and erectile nerve function test, etc. 4.HOLTER test: It is the use of the physiological phenomenon that normal erection can occur in the penis during sleep state, monitoring the erectile function of the penis during the patient’s sleep at night to identify psychological and organic ED, as the HOLTER diagnostic instrument borrows the principle of strict monitoring of the heart monitor.