The main pathological features of the congenital abnormality of penile development are: ①The distal end of the urogenital sinus, which normally extends to the genital node during the embryonic period, is underdeveloped, so that the penis is hidden under the skin, and the fibrous cord also restricts the normal extension of the penis. ② Excessive subcutaneous fat in front of the pubic bone. (3) Poor attachment of the penile skin to the penile corpus cavernosum, resulting in the corpus cavernosum being concealed in the subcutaneous tissue of the prepubic bone. ④The circumcision has been performed, and in a few children, the ring-like band caused by the scar makes the penis fall into the subcutaneous tissue. ⑤ The prepuce prevents the normal extension of the penis. The diagnosis of occult penis should be in accordance with the following aspects: ① short appearance of the penis and lack of penile skin; ② normal cavernous development of the penis hidden under the skin; ③ normal penile body can be touched by pushing the skin at the root of the penis backward with the hand, and the penile body retracts rapidly after releasing; ④ the presence of prepuce. If there is no prepuce, it should be distinguished from buried penis. Buried penis is an acquired fatty accumulation in front of the pubic bone caused by obesity, causing the penile corpus cavernosum to be buried in fat, and its onset is older, even without prepuce. The common treatment methods for occult penis are penile lengthening, penile body fixation, Devine surgery, Maizels surgery, etc., but the efficacy varies. The following aspects should be noted: ① Widen the narrow prepuce opening, lengthen the penile skin that is too short, and make sure to do it in the non-vascular area outside Buck’s fascia, so that there is less bleeding and the operation time is short. Try to reach the root of the penis and retain the normal foreskin tissue to prevent the foreskin from being too short after the correction surgery, thus affecting the surgical results. Remove the fibrous cords and thickened flesh membrane that restrict penile elongation, pull out the hidden penile corpus cavernosum, and avoid damaging the dorsal blood vessels and nerves. If the penile extension is not satisfactory, part of the penile suspensory ligament can be cut at the root of the penis (should be done immediately under the pubic bone). ③ Fix the subcutaneous tissue of the penis root on the white membrane, or fix the white membrane on the subpubic fascia to prevent the penis from retraction. ④Postoperative pressure bandage to prevent the occurrence of foreskin edema. ⑤ children with obvious fat accumulation in front of the pubic bone at the same time to remove the fat pad, fat pad removal range should be large, the range is small easy to cause the root of the penis skin depression, affecting the aesthetics. If the penile extension is still unsatisfactory, the penile suspensory ligament can be removed if necessary. According to the pathological characteristics and severity of the occult penis of the child, the author removed the cords that restrict the sliding of the penile skin during the operation (in severe cases, the penile suspensory ligament was cut off), and finally fixed the white membrane of the penile root to the pubic fascia to prevent the penis from shifting to the distal end and reduce the recurrence after the operation. If circumcision is performed for occult penis according to the circumcision, the foreskin will be lost as an important material in the correction process, which will bring great difficulties to the future treatment. If the foreskin is found to be long after the surgery, it should be trimmed to prevent the scar from binding the penis and causing the occult penis of medical origin. Patients with obvious postoperative foreskin edema, all occurring in simple circumcision dorsal transverse suture, may be related to the incomplete release of the foreskin mouth stenosis, foreskin edema and aggravate the stenosis, and early release of pressure bandage is also related, so the postoperative pressure bandage time is properly extended, can effectively reduce the occurrence of edema.