Congenital hip dislocation is a common hip joint deformity in infants and children. In China, the incidence rate of newborns is about 1/1000, of which, 1/4 are bilateral at the same time, more females than males. The occurrence of congenital hip dislocation may be related to genetics, embryonic dysplasia, birth injury, abnormal anterior femoral neck inclination angle, excessive laxity of the joint capsule and ligaments, and degeneration of the gluteal muscle fibers. Patients may show shallow medial thigh and inferior gluteal crease, wide flattening of the affected hip, unequal length of both lower extremities in unilateral dislocation, limited abduction and external rotation of the affected hip, external rotation of the walking leg, outwardly shifted foot, cocked hip or limping duck stance. Children have strong bone shaping ability, so if they are treated and reset early, the hip joint can develop according to normal physiological needs. The treatment of congenital hip dislocation is not complicated, but different treatment methods should be adopted for children of different ages; children within 3 months of age should be fixed in plaster to maintain the external position of both hips for 6 months to 1 year, while children between 3 months and 2 years of age should be fixed in plaster or brace in abduction and internal rotation position for 1 year. children between 2 and 6 years of age should be treated surgically, but good results can be achieved. If the child is 12 years old or older, the outcome is generally poorer. Because the child is over 12 years old, the hip joint is dislocated for a long time and weight-bearing, the femoral head and the upper edge of the acetabulum will be deformed by long-term friction and bony changes will occur; the true socket is poorly developed, it will be filled with fibers or fat and degeneration will occur, and the upper edge will be worn off and become slope shaped, and the femoral head will have no position to return to. If surgical reset is forced, it will cause greater pressure and roughly femoral head necrosis or hip joint stiffness. The key to treating congenital hip dislocation is the word “early”. The younger the age, the shorter the reset treatment time and the more significant the improvement in function. If not treated early, it will definitely bring serious adverse effects to the child’s future life, work and psychology, so parents must not take it lightly.