After the operation of cryptorchidism at the age of six, part of the testicle can develop, and it is necessary to closely monitor the changes of the testicle after the operation and the development of the secondary sex characteristics of the body. Generally at the age of 6 years old, cryptorchidism can only be dealt with by surgery. Before the surgery, the shape and structure of the testicles are as normal, and a large part of them can develop normally after the surgery. After the surgery, we have to pay attention to closely monitor the development of the testicles, especially when they enter puberty, and we have to closely monitor the changes in the size of the testicles as well as the hormone levels in the body. Once testicular atrophy occurs and causes a decrease in the level of androgen in the body, it is necessary to be admitted to the hospital for observation, and after diagnosing the condition, standardized treatment should be carried out under the guidance of the clinician, so as to avoid affecting the development of secondary sexual characteristics.