In-vivo biomechanical testing device and method for thoracolumbar fusion cage

The invention relates to the technical field of thoracolumbar vertebra biomechanical testing, in particular to an in-vivo biomechanical testing device and method for a thoracolumbar vertebra fusion cage. The device comprises a base, a supporting rod is installed on the base, a frame plate is arranged at one end of the supporting rod, and a detection plate is movably connected to the bottom side of the frame plate; the bottom side of the detection plate is connected with a first screw rod, one side of the first screw rod is provided with a second screw rod, the base is provided with a spine frame, the spine frame is provided with a support, and one end of the support is connected with a patch. The inaccuracy of the test result caused by the difference between the motion trail and the region each time in the detection process is reduced, the possibility that the position of the monitoring image is difficult to adjust in the motion process is reduced, and the motion position of a tester can be accurately adjuste