Abstract: Objective To examine the incidence and influencing factors of deep vein thrombosis (DVT) among patients with spinal trauma after operation,and to provide references for preventing DVT in patients after orthopedics surgery.Methods Totally 150 patients with spinal trauma surgery were selected randomly in First Affiliated Hospital of Suzhou University from March 2012 to March 2015;medical records of the patients were collected and color Doppler ultrasound examination of lower extremity venous blood vessels was carried out 6 months after the surgery.Results Among all the patients,60 were identified with post-operation DVT,with an DVT incidence of 40.00%.Multivariate non-conditional logistic regression analysis showed that aged ≥60 years,with the history of two or more abnormal coagulation indexes,experiencing the operation duration of 3 hours or more,having intraoperative hemorrhage volume of 800 milliliters or more,having intraoperative blood transfusion,and having postoperative bed time of 5 days or more were risk factors of DVT incidence.Conclusion The incidence of post-operation DVT is higher among patients with spinal trauma and the patients at older age,with more items of abnormal coagulation index,having longer operation time,with more intraoperative blood loss,having intraoperative blood transfusion,and having more postoperative bed days are more likely to have DVT.