It is generally accepted that cleft lip occurs as a result of the failure to fuse the globus pallidus at the lower end of the middle nasal eminence with the maxillary eminence on time (during the 7th week of fetal life). The congenital cleft palate, on the other hand, is due to the failure of the palatine processes on both sides to fuse with each other and with the nasal septum on time (at the 10th week of fetal life). The factors that cause the failure to fuse are not fully understood and may be related to genetics, nutrition, endocrine or infection, trauma, etc. The treatment must be a repair surgery. The main purpose of cleft lip surgery is plastic surgery, while surgery for congenital cleft palate is to restore the function of feeding and speech. The surgery is usually performed at the age of 1-3 years and often requires several operations to complete, after which speech training should be performed. Repair surgery must be performed. The primary goal of cleft lip and palate surgery is cosmetic, while in congenital cleft palate is to restore the function of eating and speech. The surgery must be performed at an appropriate age, which is decisive for the long-term outcome after surgery. I. Repair of cleft lip Early surgery provides good results. Most believe that it is more appropriate for the baby to be born at 2-3 months of age. If the nursing situation is satisfactory, the baby’s physiological xanthogranuloma has disappeared, the baby’s weight has recovered to the time of birth, and the baby’s ability to tolerate surgery has increased, repair surgery can be performed. Bilateral cleft lip surgery should be postponed until 6 months of age. The child’s health, nutritional status and climatic conditions should also be taken into account. In conclusion, it is important to complete the cleft lip repair surgery within 1 year of age. There are many methods of cleft lip repair, the most common of which are triangular flap surgery and rotational advancement surgery, both of which have the same operating principles, but only the design of the incision varies. Generally, different bases are selected on either side of the cleft and an incision is made according to these bases to remove the marginal tissue of the cleft. The upper lip is then turned up and a relaxing incision is made at the gingival labial sulcus on both sides of the defect and the nasal pedicle, nasal wing and the entire upper lip are completely separated from the upper award periosteum. In this way, there is no tension in the sutures, which allows the displaced nasal column and lip to return to the median position, and also allows the deformed nasal wing (nostril) on the cleft side to regain its normal shape. Finally, the muscle, skin and mucosa are sutured in layers according to the base point. Since the sutures of this type of surgery are serrated. It is far better than the previous linear suture because it can avoid the upward shrinkage of the lip red (gap) due to the scar contracture. Second, the repair of congenital cleft palate surgery too early age, can prevent the normal development of the upper skull, so that the palate narrowed and shortened. The occlusion of the upper and lower dentition can be impaired. On the contrary, if it is too late, it is often difficult to correct the patient’s pronunciation. In order to restore the correct pronunciation without hindering the normal development of the upper cranium, in general: 1. For cleft palate, soft congenital cleft palate or mild soft and hard congenital cleft palate, the age of surgery is 2-3 years old. These types of congenital cleft palate mostly do not impede the normal development of the upper skull. 2, For severe soft and hard congenital cleft palate, especially complete (through) congenital cleft palate, the cleft lip and the bottom of the cleft side nostril should be repaired first 5-6 months after the child’s birth, and the congenital cleft palate surgery should be postponed until 4-5 years of age, when the maxilla has developed to a great extent that the surgery will not cause severe palatal deformation, and there is enough time to correct the child’s articulation before he/she starts school (up to 7 years old).