Objective To investigate the diagnostic value of Graf ultrasound in the development of developmental hip dysplasia (DDH) in infants aged 0-6 months, in order to provide reference for clinical screening for DDH. Methods A total of 1 393 infants with suspected DDH admitted to the neonatal ward of Jinchang First People's Hospital from July 2014 to October 2019 were examined by Graf ultrasound, and clinical and X-ray examinations were performed as the "gold standard" to determine DDH.Graf ultrasound diagnosis results, diagnostic accuracy, specificity, and sensitivity were analyzed, and the differences on α and β angles between normal hip abnormal and DDH were compared. Results 1) Among 1 393 infants who underwent Graf ultrasound examination, the detection rate of DDH was 5.60%.The proportion of DDH in female infants was significantly higher than that of male infants, and the proportion of breech delivery in infants with DDH was significantly higher than that of non-breech delivery (P <0.05).Among the 2 786 hip joints examined, the hip joint abnormality rate was 4.74%.Moreover, α angle of the abnormal hip joint was significantly smaller than that of the normal hip joint, β angle was significantly larger than that of the normal hip joint (P <0.05).2) The accuracy of Graf ultrasound in the diagnosis of developmental hip dysplasia was 100%, the specificity was 99.87%, and the sensitivity was 100%.3) Totally 96 of 278 type Ⅱa hip joints were converted to type Ⅰ, 4 of 10 type Ⅱb hip joints were converted to type Ⅰ, and 132 abnormal hip joints were treated with plaster fixation or Pavlik sling Later all turned to normal hip joints during follow-up. Conclusion Graf ultrasound is of good diagnostic value for DDH in infants and young children aged 0~6 months, and it is worthy of clinical application.