In male reproduction organ, prostate is a the biggest accessary sexual gland. Its configuration resembles chestnut sample size, make an appointment with 15g left and right sides again. Prostate is by muscle fiber and gland body are comprised, gland body occupies 70 ％ about, musculature occupies 30 ％ about, for prostate support organization. Before prostate cent is, hind, medium, left, right 5 leaves, the left and right sides is side leaf, two ejaculation canal and urethral between call middle period, the leaf after be after, the leaf before the muscle fibre before two side Xie Yu is urethral is, clear boundary line is not had between each leaf actually. When rectum touch, center has the one shallow channel of vertical travel in side leaf, for the mark of touch. Prostate can secrete a kind of milky liquid, when ejaculating, the spermatozoon in prostate fluid, spermatic fluid, epididymis and seminiferous duct follows the exudate of urethral ball gland, together classics is urethral outside shooting a body, among them the 30 ％ of 15 ％ ～ that prostate fluid occupies ejaculation to measure are controlled. The acidity phosphoric acid that special Gao Nong contains to spend in prostate fluid is enzymatic, it still contains fibrin to dissolve enzymatic, the seminal fluid of curdle is new and liquefacient. Prostate fluid is alkalescent, but the acidity secretion in amortize vagina, with getting used to spermatozoon live, be helpful for the activity of spermatozoon. Additional, a large number of hyaluronidases are contained in prostate fluid, make spermatozoon crosses cervix easily the glue shape gland of mucous bolt and ovum, be helpful for be fertilized reaching a bed. Because prostate dissects positional relationship, in clinical on have its principal port. After male age arrives 45 years old, some begins atrophy, but most (gland body is organized) produce hypertrophy, affect micturition function. The vein of prostate is in pubic prostate the vein of district office and penis is confluent, make prostate vein collection, this vein clump bleeds easily when becoming an operation, answer to add an attention more. Prostate vein clump and naevus venous relationship are close, it is a way that prostate cancer changes, it is the important way that liver changes. As a result of clump of the vein outside prostate vein clump and putamen, existing to be raised without the vein traffic of valve, it is the way that prostate cancer centrum changes so. Accordingly, understanding prostate physiology and anatomize, very helpful to the make a diagnosis and give treatment of clinical disease.