Detachable pedicle screw

The invention discloses a detachable pedicle screw. A screw body and a screw tail adopt a split type structure, micro holes are evenly formed in the screw body and the front end of the screw tail, and the axes of the micro holes are perpendicular to that of the screw body. The pedicle screw adopts the split type structure, namely, a spinning structure, a clamping structure, an insertion structure and the like, the screw body and the screw tail are made of magnesium alloys having advantages of degradability, biocompatibility and the like, meanwhile, the micro holes perpendicular to the axis of the screw body are formed in the screw body and the front end of the screw tail, so that bone trabeculae can be distributed along the micro holes, synchronous reconstruction of the bone trabeculae is allowed during fracture healing, the continuity of the bone trabeculae in vertebrae is recovered, dual healing of fracture cortex and spongiosa is realized, the structure and mechanical conduction features are effectively recovered, the internal fixation complication incidence can be significantly reduced, the fracture treatment effect can be improved, peripheral soft tissue and blood circulation can be effectively protected, the internal fixator related complication occurrence risk is reduced, and pain and economic burden caused by secondary major surgery on patients are avoided.