Objective  To establish a normal three-dimensional model of the hip bone in adolescents aged 10-19 years old, analyze the morphology and positional parameters of the posterior superior iliac spine of the hip bone among different genders, sides, and ages, which can supplement the study of the anatomical morphology of the hip bone and to provide a reference for the diagnosis of the clinically relevant diseases and for the therapeutic manipulation and localization of the hip bone.  Methods  Forty adolescent patients aged 10-19 years without previous spinal pelvic diseases were selected, and the pelvic CT image data were collected and imported into Mimics 21.0 software to establish the model. The relative position parameters of the posterior superior iliac spine and the surrounding anatomical landmarks included the length from the posterior superior iliac spine to the anterior superior iliac spine (ab), the length from the tip of the posterior superior iliac spine to the sciatica (ac), the length from the tip of the posterior superior iliac spine to the pubic tubercle (ae), the length from the tip of the posterior superior iliac spine to the midpoint of the posterior margin of the auricular joint surfaces (af), the length from the tip of the posterior superior iliac spine to the iliac spine turn (ag), and the length from the sciatica tubercle to the highest point of the iliac spine (cd). The local parameters of the posterior superior iliac spine included the width (W0) and the thickness (H0) at point A. The maximum width of the posterior iliac spine (WMAX), its distance from point a (D0), and the width of the iliac spine were measured at 0.5, 1, and 1.5 cm from point a, and were recorded sequentially as W1, W2, and W3. The width of the iliac spine at the turn of the iliac spine (point g) was measured (W4). The relative positions and parameters of the posterior superior iliac spine to the surrounding anatomical landmarks and the localized parameters of the posterior superior iliac spine were compared sequentially for different genders, sides, and age groups.  Results  In the measurement result  of the parameters of the posterior superior iliac spine and the surrounding anatomical landmarks, the differences in the comparisons between different genders of the ac, ae, and af indexes were statistically significant (P<0.05), and the differences in the comparisons between different genders of the ab, ag, and cd indexes were not statistically significant (P >0.05). The differences in the comparisons between the right and left sides of the ab, ac, ae, af, ag, and cd indexes were not statistically significant (P>0.05). The difference in comparison between different age groups of ab, ac, ae, af, ag, and cd indicators was statistically significant (P<0.05). In the measurement result  of the local parameters of the posterior superior iliac spine, the difference in the comparison between the sexes of the W0, W1, W2, WMAX, and H0 indexes was statistically significant (P<0.05), and the difference in the comparison between the sexes of the W3, W4, and D0 indexes was not statistically significant (P>0.05); And the difference in the comparison between the left and right sides of the W0, W1, W2, and the right and left sides of the W3, W4, WMAX, D0, and H0 indexes was not statistically significant (P>0.05); The difference between W0, W1, W2,W3, W4, WMAX, D0, H0 indicators compared between different age groups was not statistically significant (P>0.05). Conclusion  Adolescent females have overall greater pelvic parameters than males, with wider and thicker tips of the posterior superior iliac spine in females and narrower and thinner tips of the posterior superior iliac spine in males; Pelvic parameters show a tendency to increase with age, while the width and thickness of the posterior superior iliac spine, as well as the width of the cephalic end to the iliac spine remain essentially unchanged.