The vast majority of cleft palates occur as a result of both genetic and environmental factors. Cleft lip and palate not only affects the aesthetics, but also the child’s breathing, sucking, swallowing and speaking functions, and also causes great psychological stress to the child and parents, affecting the child’s healthy growth, so it must be detected early and diagnosed early and treated actively. The diagnosis of cleft lip and palate is as follows: 1. Cleft lip is characterized by a small opening of varying length in the upper lip after birth. The opening is often on the partial side of the “human middle”, which becomes a unilateral cleft lip, and if both sides of the human middle are cleft, it becomes a bilateral cleft lip. The length of cleft lip varies, and clinically cleft lip is divided into three degrees according to the length of the cleft, just a small opening in the red lip is called degree 1, from the red lip to the middle of the person is called degree 2, from the red lip all the way to the nostril out is called degree 3 cleft lip. 2.Characteristics of cleft palate The cleft involves the soft palate and part of the hard palate, and is often accompanied by unilateral incomplete cleft lip at the same time. The alveolar ridge of the incisor is intact and is called incomplete cleft palate. The cleft starts from the uvula and reaches the incisor foramen, then slopes outward, usually separating from the anterior jaw bone at the unilateral incisor site, and is called a unilateral complete cleft palate. It often occurs at the same time as bilateral complete cleft lip. The cleft is oblique to the sides at the lateral incisors, with the nasal septum isolated and free in the center. The palatal plates on both sides sometimes have a tendency to move from a horizontal to a vertical position, which increases the cleft and reduces the nasal cavity, and is called bilateral complete cleft palate.