Varicocele is mostly seen in young people aged 20 to 30 years old, with an incidence of about 12%, and infertility caused by varicocele accounts for 9% to 41% of male infertility. The main reasons for male infertility caused by varicocele are: ① testicular temperature is on average higher than normal; ② increased pressure in the spermatic vein, blood stagnation, interference with testicular metabolism; ③ testicular local hypoxia due to venous blood return obstruction, sperm growth environment changes; ④ in the spermatic vein reflux blood, the influence of toxic substances can lead to testicular spermatogenic dysfunction; ⑤ testicular secretion cells are inhibited and The testosterone secretion decreases; ⑥The left and right testicular venous plexuses communicate with each other, so varicocele on one side often causes testicular damage on both sides. As a result of these causes, testicular damage is eventually caused. Sperm production is inhibited and semen quality is altered (decrease in sperm count, increase in the proportion of deformed sperm with pointed or irregular shape and immature sperm, and decrease in sperm motility).