Objective:To analyze the independent risk factors for the development of deep venous thrombosis(DVT)in the lower extremities of patients after traumatic spinal fracture surgery.Methods:A retrospective analysis was conducted on the clinical data of 205 patients who underwent traumatic spinal fracture surgery in Yichang Central People's Hospital from September 2021 to February 2024.Based on the results of lower extremity venous ultrasound examination within 1 week after surgery,the patients were divided into the DVT group(n=55)and the non-DVT group(n=150).Univariate and multivariate Logistic regression analyses were used to identify the risk factors for the development of postoperative DVT.Results:The overall incidence of postoperative DVT was 26.83%(55/205),including 3 cases of proximal thrombosis and 52 cases of distal thrombosis.Multivariate Logistic regression analysis showed that increased age(OR=1.120,95%CI:1.061,1.183),elevated D-dimer(OR=1.347,95%CI:1.112,1.633),prolonged bed rest(OR=1.313,95%CI:1.137,1.516).hypoproteinemia(OR=14.380,95%CI:3.957,52.263),and blood transfusion(OR=5.707,95%CI:1.828,17.820)were independent risk factors for the development of postoperative DVT in patients with traumatic spinal fractures(all P<0.001).Receiver operating characteristic(ROC)curve analysis showed that the area under the curve(AUC)values for increased age,elevated D-dimer,prolonged bed rest,hypoproteinemia,and blood transfusion were 0.734,0.884,0.822,0.777,and 0.760,respectively.The diagnostic cutoff values for postoperative D-dimer,age,and bed rest were determined using the Youden index,which were 3.185 mg/L,47.5 years,and 12.5 days.Conclusion:The incidence of DVT after traumatic spinal fracture surgery is high,and age>47.5 years,D-dimer>3.185 mg/L,bed rest>12.5 days,hypoproteinemia,and blood transfusion are independent risk factors for the development of DVT in patients with traumatic spinal fractures surgery.