Abstract: [Objective] : To explore the related factors of hip dislocation in children with spastic cerebral palsy. [Methods]: From January 2014 to December 2021, 235 children with spastic cerebral palsy (470 hips in total) were enrolled in our hospital, including 172 males and 63 females, aged (8.29±3.24) years old. All the children were admitted to the hospital. After the completion of the pelvic anteroposterior X-ray film, the clinical data is complete. Basic information such as age, gender, and GMFCS were collected from medical records, and imaging indicators such as MP, HSA, NSA, and AI were measured.The dislocation group and the non-dislocation group were set according to the MP value, and the data were grouped for comparison and regression analysis between groups.[Results]: HSA, NSA, AI, GMFCS and other factors were positively correlated with hip dislocation (P ＜ 0.05). Binary multivariate logistic regression analysis showed that GMFCS, HSA, AI and other factors were independent risk factors for hip dislocation (P ＜ 0.05). [Conclusion]: In children with spastic cerebral palsy, the decline of gross motor function and the developmental deformity of proximal femur and acetabulum are closely related to the occurrence of hip dislocation.