Testicular cancer is one of the common tumors of the male reproductive system, and testicular tumors are almost always malignant. The most common symptoms of testicular cancer are progressive, painless enlargement of the testicle with a feeling of heaviness and swelling and hardening of the testicle. It is mainly divided into germ cell tumors, non-germ cell tumors and secondary tumors of the testis. Among them, germ cell tumors account for 90% to 95%, with seminoma being the most common. Non-germ cell tumors account for 5% to 10%. Testicular tumors are divided into two categories, primary and secondary, with the vast majority being primary and secondary being extremely rare. The specific etiology is still not very clear, but it is believed that the cause is related to both genetic and acquired factors. Among them, the closest relationship is with cryptorchidism, which has 10-14 times greater chance of developing tumor than normal, and the intra-abdominal cryptorchidism is higher than inguinal. At present, the treatment of testicular tumor is divided into surgery, radiotherapy and chemotherapy. Once diagnosed with testicular tumor, radical orchiectomy should be performed first, and then further treatment plan should be decided according to pathological examination results. As mentioned above, testicular cancer is a common tumor in male reproductive system, most of which are malignant. If diagnosed, it requires surgery, radiation therapy and chemotherapy.