Congenital hip dislocation, also known as developmental hip dislocation, is divided into two major types: the first type is the simple type, the most common, which can be divided into three types: acetabular dysplasia, hip subluxation and hip dislocation, of which hip dislocation can be divided into degree I, degree II and degree III according to the degree of dislocation; the second type is the deformed type. The incidence of hip dislocation in newborns is about 4 per 1,000-11 per 1,000. It is best to seek detailed examination by a professional pediatric orthopedic surgeon shortly after birth, especially for children with northern lifestyle, girls, family history of hip dislocation, first birth, low amniotic fluid, breech position, combined intrauterine extrusion-related deformities, asymmetry of both lower limbs, asymmetry of the hip pattern or thigh pattern, limited abduction of both hips, and other related high-risk factors. This is especially true for children with high risk factors. Depending on the specific physical examination of each child, or the results of ultrasound or x-ray, the doctor will develop a reasonable treatment plan to achieve satisfactory results.