Objective To evaluate the biomechanics and clinical effects of phoenix-bitailed plate in treating thoracolumbar vertebrae burst fracture. Methods 8 burst fracture models in thoracolumbar vertebrae were made up from adult cadaver spinal specimens (T12～L2 ). Phoenix-bitailed plates were implanted into the models as actual operation. And they were tested under the axial and torsional load. Phoenix-bitailed plates were used to treat the thoracolumbar vertebrae burst fractures. And the curative effects were observed. Results The strain value of each tested point changed linearly according as the axial or torsional load changed even if the axial load increased to 600N or the torsion reached to 600N·cm. There is linear relation between the torsion and the torsion angle. The latter was only 6.26° when the former reached to 600N·cm. The clinical observation shows that the fixation with phoenix-bitailed plate is reliable. Conclusion The clinical application of phoenix-bitailed plate is worth generalizing for the fixation with it is very fastness and has high elasticity.