In the last year, we have seen many white-collar layer in the male infertility clinic with semen abnormalities, most of which are prolonged liquefaction time, poor activity rate of class A and B, followed by low sperm density, low viability and increased white blood cells in semen, many patients are in a very anxious mood, both hoping to get a precious son or a thousand gold early, and fearing that they cannot have malformations or congenital diseases to bring lifelong misfortune to their children. I would like to give a preliminary description of semen analysis. Among people with infertility diseases, semen parameters are taken very seriously. Although it does not completely determine whether fertility can be achieved, an accurate semen analysis examination is still an important test for male infertility with 70% reference value. Before semen analysis, I would like to give an account of the composition of semen, which consists of spermatozoa and seminal plasma; spermatozoa are male reproductive cells, which are differentiated and derived from testicular spermatogenic cells, mature in the epididymis and are output by the vas deferens. Seminal plasma is a mixture of secretions from the male accessory glands. It has the role of transporting sperm, providing sperm nutrition, stimulating sperm vitality, etc. The analysis of normal semen composition is listed below: Name Normal value Semen volume 2~7ml Color Grayish white or slightly yellowish pH PH7.2~7.8 Liquefaction time within 30 minutes Viscosity Normal its length