The current study develops a finite element model of a thoracolumnar-spine for numerical investigation of spine degraded by spinal tuberculosis. With computational capability to be used in a optimal manner, a simplified model with vertebral bodies, intervertebral-disc, ligament and musculature structures are developed. The geometry of the spinal units were extracted from CT-Scan data using existing image processing codes from T1toS1, a total of 17 levels. The polylines generated is imported as IGES to CAD-software Ideas11NXseries. 3D points were generated on the polylines in the locations of vertebral bodies, intervertebral-disc, posterior segments, and facet joints with their appropriate orientation and were connected using spline curves. Appropriate section for the various segments is built from the polylines and assigned to vertebral bodies, intervertebral-disc, and posterior processes that were then modeled with beam elements. The seven major ligaments of spine were modeled using link elements with appropriate crossectional area and non linear properties. The MMRotatores muscle that runs along transverse processes is modeled using link element with appropriate material and geometry data. The necessary boundary conditions were assigned solved using Ansys 10. The validation of the model is done using experimental results available in the literature. The Spine TB is characterized by destruction of spinal-bodies depending on the progress and its stage. The disruption finite element model illustrates the snaping of the vertebral column phenomena observed clinically. © 2009 International Federation of Medical and Biological Engineering.