Varicocele (VC) is a common genitourinary disorder in men and a major cause of male infertility. It is mostly seen in young adults, with an incidence of 10% to 15% of the normal male population and 19% to 41% of male infertility. Varicocele is a vascular spermatogenic disorder caused by the expansion of the spermatic veins and trapezius plexus that surrounds the spermatic cord. It is more common on the left side, but can also occur bilaterally or solely on the right side. Traditionally, an inguinal incision is made to ligate the internal spermatic vein at a high level, and some of the dilated veins in the scrotum are removed. Etiology: congenital absence of valves in the spermatic veins or incomplete closure of the valves causing venous blood reflux is the main cause of varicocele. The left spermatic vein is longer than the right one and flows at a right angle to the left renal vein, resulting in a long blood return path and increased resistance, and the left spermatic cord is also compressed by the sigmoid colon. The left spermatic cord is also compressed by the sigmoid colon. In addition, the elastic fibers of the vessel wall are poorly developed. These reasons cause the incidence of the left side is obviously higher than the right side, clinically the left side accounts for 90%, only 10% of bilateral, simple right side is rare. Symptoms: Patients with varicocele mainly show wet and cold scrotum, swelling and pain, hidden pain, and the uncomfortable feeling often radiates to the ipsilateral perineum, groin and waist, and the symptoms will increase after exertion, long time walking, strenuous exercise and sexual activity, and can be relieved after lying down and resting. In a few cases, there are also signs of neurasthenia such as emotional instability, insomnia and dreaminess, mental depression and fatigue. Even sexual dysfunction such as decreased libido, decreased sexual pleasure, painful intercourse, erectile dysfunction and premature ejaculation may occur. Third, the harm: varicocele can affect fertility. The reason is that the temperature in the affected scrotum increases, and the reflux of substances that have an adverse effect on sperm production causes damage to the spermatogenic epithelium of the testis. In severe cases, this can cause testicular atrophy and reflection to the opposite side, causing degeneration and atrophy of spermatogonia and a decrease in the number of spermatozoa. Clinically, 40% of male infertility patients have varicocele. Treatment: Varicocele can only be treated surgically, non-surgical treatment is not effective. 1.Since varicocele may affect fertility, all infertile teenagers should be treated surgically. 2, Patients with varicocele who have poor quality semen examination for male infertility should be operated as early as possible. 3.Patients with more serious local symptoms and no no other reasons should also be treated surgically. Surgical treatment methods: 1.High ligation of spermatic vein via inguinal route: this surgery is simple and easy, but there is a possibility of missing the venous branch and damaging the genitofemoral nerve. 2.High ligation of the spermatic vein through the extraperitoneal route of the iliac fossa: most of the trapezius plexus above the inguinal ring converges into one internal spermatic vein, and the possibility of missing the vein branch is very small. It is more difficult for young surgeons with less experience to find the internal spermatic vein. But experienced doctors can finish the surgery with only 1~2 cm incision. 3.Laparoscopic high spermatic vein ligation: Single-hole laparoscopy can be used to perform this operation, which is aesthetically pleasing and has little psychological impact, but there is a problem that the cost increases significantly.