Pediatric developmental dysplasia of the hip is a common orthopedic disease involving the hip joint, which often causes hip deformity and dysfunction, and later progresses to osteoarthritis of the hip and necrosis of the femoral head, etc. The etiological mechanism of DDH is very complex, and it is a polygenic genetic disease. The clinical symptoms and signs of DDH vary greatly among different age groups, and the condition of the children will gradually worsen with age and joint development. If the disease is not standardized as early as possible, the children will progress to the arthritic stage at an early age, and ultimately, they have to choose artificial joint replacement to rebuild the normal structure and function of the hip joint. Therefore, early diagnosis and treatment of DDH are important for correcting the growth and development of children and improving their future quality of life. Although a considerable number of studies have been conducted to provide diagnosis and treatment of DDH, there is still a lack of uniform and accurate clinical guidance on what diagnosis and treatment should be used for different children. This article reviewed the targeted and stepwise diagnostic and treatment options for children with DDH of different ages and severity of subluxation, as well as the use of artificial intelligence and other digital technologies to assist in the diagnosis and treatment of DDH, with the aim of further improving the diagnosis and treatment of this disease.