Testicular cancer is one of the most common tumors in urology and it is almost always malignant. Risk factors for testicular cancer include a history of cryptorchidism (testicular hypoplasia syndrome), Klinefelter’s syndrome, a family history of testicular cancer in the father or brother, contralateral tumors, or testicular in situ (TIN). Hypospadias is a risk factor that needs to be further identified. Cryptorchidism is 10-14 times more likely to develop tumors than normal. To prevent testicular cancer, male friends should pay attention to regular testicular examination at an early stage in order to detect abnormal testicular symptoms early and treat them at an early stage. To prevent testicular cancer, male friends should pay attention to physical exercise to enhance their physical fitness and self-resistance, and it is better for them to have regular exercise. Male friends should also pay attention to psychological adjustment. They should avoid stress or overwork, learn relaxation skills and do something enjoyable. To prevent testicular cancer in daily life, male friends should also pay attention to develop good dietary habits, and have proper and low-fat diet.