Semen is mainly composed of two parts, seminal plasma and spermatozoa, and its main function is to combine with the woman’s egg to form a fertilized egg for the purpose of pregnancy. Semen is the fluid ejected from the urethra after a man is in a state of orgasm. Normal semen consists of sperm and seminal plasma, a viscous liquid mixture that usually liquefies in about half an hour after it is expelled from the body. Sperm is produced by the testes and transported through the vas deferens to the seminal vesicle glands, which have the ability to combine with the egg to form a fertilized egg; seminal plasma is mainly produced by the prostate, seminal vesicles, urethral bulbourethral glands and other accessory glands, which are secreted together to form a mixture of fluids, containing proteins, inorganic salts, sugars and other substances, which provide energy for the spermatozoa, and also serve as a vehicle for the spermatozoa. It is worth noting that the quality of semen can be effectively improved in daily life through a reasonable diet, appropriate exercise, and avoiding late nights and alcohol consumption.