There are many methods of penile lengthening, the more effective and easy to do surgery is the penile suspensory ligament cutting method to lengthen the penis, the surgical indications and methods of the operation are introduced as follows: 1, penile lengthening indications: 1, penile dysplasia; 2, congenital micropenis: its penis length less than 5cm when weak, erection length less than 10cm can not meet the sexual requirements of the female; 3, penile cancer to perform part of the penis After excision; 4, such as: erection of the penis is slightly small or basically normal, but the patient’s psychological barriers and even affect the normal sex life; 5, accompanied by penile fistula impotence, for penile ligation of the deep and superficial veins of the dorsal penis at the same time for penile lengthening, can often achieve better results; 6, occult penis penile plastic surgery can be done at the same time penile lengthening. Second, the basic principles of penis lengthening and surgical methods: the penis is mainly composed of two penile corpus cavernosum and a urethral corpus cavernosum, wrapped with fascia and skin. It can be divided into three parts: head, body and root. The posterior end is the root of the penis, which is fixed to the subpubic and sciatic branches, and is the fixed part. The middle part is the body of the penis, which is cylindrical in shape and suspended by ligaments below the anterior part of the pubic symphysis, and is the movable part. The enlarged part of the anterior part of the penis is the head of the penis. In addition to being fixed to the inferior pubic branch and the sciatic branch, the penis is also fixed to the pubic symphysis and the lower part of the ventral white line by means of the penile suspensory ligament. The penile suspensory ligament includes the superficial suspensory ligament of the penis and the deep suspensory ligament of the penis, the former is in a shallow position and is a dense bundle of connective fibers formed by the thickening of the deep layer of the superficial fascia of the abdominal wall in the midline, the ligament is about 3.1 cm wide and 0.4 cm thick, and can lengthen the penis by 2-4 cm after cutting. The deep suspensory ligament is a triangular-shaped bundle of dense connective tissue fibers, attached to the lower part of the front of the pubic symphysis and the penile fascia, the ligament is strong and short, 0.5cm wide and about 2.5cm thick, cut off one-third to one-half, the penis can be lengthened by 1.0cm. Penis lengthening, that is, surgery to cut off the superficial suspensory ligament and part of the deep suspensory ligament of the penis, so that the original fixed in front of the pubic symphysis and the subpubic branch of the penis can be free, so that the penis length can be increased by 3-5cm. As part of the deep suspensory ligament and the integrity of the corpus cavernosum are preserved, the penis can still maintain its strength and stability when erect.