The specific etiology of congenital hip dislocation is not completely clear at present, and it is mainly considered to be related to genetic factors as well as primary hip dysplasia and the laxity of the surrounding joint capsule and ligament, and the environmental factors of the fetus in the mother’s body. 1. Genetic factors: current research shows that congenital hip dislocation has a certain degree of family aggregation, so it is thought to be genetically related. 2. Primary hip dysplasia and laxity of the surrounding joint capsule and ligaments: this can lead to shallow acetabulum and weakening of the binding force of the surrounding ligaments and joint capsule on the head of the femur, which will easily dislocate the head of the femur from the hip joint, thus causing congenital hip dislocation. 3. Maternal factors of the fetus: the fetus in the process of development due to fetal malposition or excessive pressure on the hip joint will destroy the normal anatomical relationship of the hip joint, thus causing hip dislocation. The cause of congenital hip dislocation needs further research to confirm its exact cause.