The probability of getting testicular cancer in cryptorchidism is 20-50 times higher than that in normal people, so it is recommended that all cryptorchidism patients should be detected at an early stage and undergo testicular descent and fixation surgery at an early stage. Cryptorchid testis is located in the retroperitoneum or inguinal canal for a long time, where the temperature is higher, it is 1.5-2℃ higher than the temperature of the scrotum, and the probability of testicular cancer will be significantly increased when it is in the retroperitoneum for a long time. It is recommended that all patients with cryptorchidism not only need to have the testicle descended and immobilized, but also to closely monitor the indicators of alpha-fetoprotein, carcinoembryonic antigen, chorionic gonadotropin, and lactate dehydrogenase. If there is any movement in these indicators, it is important to suspect that cryptorchidism has a tendency towards testicular cancer.