Varicocele is present in 15% of normal men and 40% of them suffer from male infertility. About 70% of patients with secondary infertility have varicocele as the underlying cause. The World Health Organization reported that 25.4% of 9043 male infertility cases had abnormal semen parameters in patients with varicocele (WHO 1992). The World Health Organization considers varicocele to be closely associated with testicular impairment and infertility. However, repair of varicocele not only improves spermatogenesis but also testicular interstitial cell function (Dubin, Amelar, 1997), and varicocele is considered to be the cause of male infertility most in need of surgical correction. Varicocele repair is a routine surgical procedure for the treatment of male infertility. The more severe the varicocele, the higher its correlation with semen quality impairment. Repair of severe varicocele showed more significant improvement in semen quality than repair of mild varicocele. (Steckel et al., 1993; Jarow et al., 1996) Main clinical manifestations Discomfort or cramping in the scrotum, pain radiating to the groin area and lower abdomen, aggravated by standing and walking and relieved by lying down at rest. It can be diagnosed by physical examination and ultrasound. Indications for treatment Adult men with varicocele become absolute indications for surgery if they are compatible with the following four conditions: 1) the couple is infertile; 2) the female partner has normal fertility or the female partner is infertile but treatable; 3) varicocele can be palpated on physical examination or is suspected to be diagnosed by ultrasonography; 4) the male partner has abnormal semen analysis; 5) adolescent males who have reduced testicular volume on the varicocele side Studies have shown that sperm quality (50%-60% improvement) and overall pregnancy rate (30%-40% improvement, Nagler;) are significantly improved in patients with varicocele infertility after treatment.