The cleft palate, due to the presence of a cleft between the oral cavity and the nasal cavity, cannot create the necessary negative pressure in the oral cavity when sucking milk, resulting in difficulties in sucking milk, often leading to malnutrition, otitis media and respiratory infections, newborns or infants with severe cleft palate often have sucking and swallowing dysfunction, resulting in nutritional impairment and choking when sucking milk, and aspiration pneumonia. According to the degree and location of cleft bone, mucosa, and muscle layer in the hard and soft palate, the following clinical diagnosis is mostly used: 1. Soft cleft palate Only the soft cleft palate is open, sometimes limited to the palatal lobe. It is not divided into left and right, usually not accompanied by cleft lip, clinically more common in women. 2, incomplete cleft palate also known as partial cleft palate. The soft palate is completely cleft with part of the hard cleft palate; sometimes accompanied by unilateral incomplete cleft lip, but the alveolar process is often intact. This type is also not distinguished from the left and right. 3.Unilateral complete cleft palate The cleft is completely cleft from the palatal lobe to the incisal orifice, and is obliquely directed laterally to the alveolar process, which is connected with the alveolar cleft; the edge of the cleft on the healthy side is connected with the nasal septum; the alveolar process cleft sometimes disappears and only the cleft remains, sometimes the cleft is very wide; it is often accompanied by ipsilateral cleft lip. 4.Bilateral complete cleft palate Often occurs at the same time with bilateral cleft lip, the cleft is in the premaxillary part, each oblique cleft to both sides, straight to the alveolar process; the nasal septum, premaxillary process and prelabial part are isolated in the center.