Since advent of three-column theory, brust fracture of the spinal column has long been recognized as the most common fracture of the thoracolumbar spine. Due to canal compromise by the retropulsed bony fragment, neuralgic defect was prevailed in this type of spinal injury. In the literature recently, new information being presented on the classification, concepts of stability and instability, need for surgery, and selection of the most appropriate surgical implant. Distraction force with kyphosis correction has been thought the most effective way in reducing the retropulsed fragment, either during the operation by variable implants or by traction device preoperatively, such as traction bow device. A number of biomechanical studies has been done on the isolated lumber spine under axial loads to determine the load distribution. Little study was performed on the whole spine under traction to determine the relative distribution of strain. The purpose of this study is to use the whole spine of goat under the axial load in INSTRON machine and Traction Bow to investigate the biomechanical properties such as train distribution, deformation of disc, and load- to-failure. Next, we try to reproduce a burst fracture model for further study in traction -reduction experiment. From the strain distribution diagram, the junction of thoracolumber spine bears the larger strain. The strain in the thoracic region is mediate, in contrast, the strain in lower lumbar is smaller in our experiment. The mean deformation of disc is 2.86mm, 5.09mm,6.45mm at the loading of 10kg, 20kg, 30kg reapective. The mean maximum loading of goat spine is 91.40kg in the load-to -failure test. In this study, strain distributions of spinal column observed by INSTRON machine and Traction bow are similar. However, the strain values from traction Bow is smaller. In conclusion, the junction of thoracolumbar spine is more effective in traction from its larger strain distribution. Hence, using the appropriate traction force in intact cervical vertebrae will have a better reduction effect to burst fracture of thoracolumbar vertebrae. The load -deformation disgram, total deformation, and maximum loading in this study will be helpful for related researches in the future.