Varicocele refers to obstruction of venous reflux in the spermatic cord, valve failure, and blood stagnation due to reflux, resulting in dilatation, elongation, and curvature of the trabecular veins. The disease is mostly seen in young adults, the majority of whom are between the ages of 18 and 30. The proportion of varicocele in male infertility is about 21%-42%, with the highest being 81%. 80%-98% of varicocele occurs on the left side and up to 20%-58% in bilateral cases. Most people believe that varicocele can affect the occurrence of sperm and semen quality and cause infertility, and some patients can regain fertility after surgical treatment. The reasons for the high incidence of varicocele on the left side are: 1. The left internal spermatic vein has a long stroke and enters the left renal vein vertically with high hydrostatic pressure. 2, The left internal spermatic vein is compressed by the anterolateral sigmoid colon. 3, The left renal vein may be compressed between the aorta and superior mesenteric artery, which affects the spermatic vein reflux. 4, The right common iliac artery may compress the left common iliac vein and obstruct the venous reflux of the left vas deferens. 5.The venous valve is not sound. 6.The connective tissue around the spermatic vein is weak or the levator muscle is not fully developed. 7, The upright posture of the person affects the spermatic vein reflux.