Objective To explore the factors affecting postoperative functional rehabilitation of the hip joint in patients with osteoporotic acetabular fractures.Methods A total of 341 patients with osteoporotic acetabular fractures treated in the Department of Orthopedics of our hospital from June 2015 to April 2018 were selected. All the patients were followed up for 12 months except for 23 cases lost to follow-up. According to the outcome of postoperative functional rehabilitation, the patients were divided into good rehabilitation group (n =257) and poor rehabilitation group (n =61). General data of two groups were analyzed and compared, and unconditional multivariate Logistic regression analysis was performed to determine the factors affecting postoperative functional rehabilitation of the hip joint.Results There were significant differences in age, history of alcohol consumption, pneumonia, Letoune1-Judet fracture type, hip dislocation, time from fracture to operation, quality of fracture reduction, lower limb deep venous thrombosis, heterotopic ossification, nerve damage, postoperative anti-osteoporosis treatment and postoperative rehabilitation training time between the two groups (P < 0.05). The unconditional multivariate Logistic regression analysis showed that the quality of fracture reduction [R = 2.748 (95% CI: 1.700, 4.442)], lower limb deep venous thrombosis [R = 2.440 (95% CI: 1.258, 4.733)], time from fracture to operation [R = 2.140 (95% CI: 1.393, 3.288)], postoperative anti-osteoporosis treatment [R = 0.458 (95% CI: 0.213, 0.985)], heterotopic ossification [R = 1.842 (95% CI: 1.021, 3.323)], postoperative rehabilitation training time [R = 0.582 (95% CI: 0.398, 0.851)] and age [R = 1.523 (95% CI: 1.252, 1.853)] were independent factors affecting postoperative functional rehabilitation of the hip joint (P < 0.05).Conclusions The quality of fracture reduction, lower limb deep venous thrombosis, time from fracture to operation, postoperative anti-osteoporosis treatment, heterotopic ossification, postoperative rehabilitation training time and age are independent factors affecting postoperative functional rehabilitation of the hip joint in patients with osteoporotic acetabular fractures. Thus, these factors should be taken into account when making treatment decisions in order to improve the mobility of the hip joint and the quality of life of patients.