Disassembling tool special for plastic expansion nail

The invention provides a disassembling tool special for a plastic expansion nail. The disassembling tool comprises a grab handle, a connecting rod and a self-tapping screw, the self-tapping screw is fixed at one end of the connecting rod, the grab handle is fixed at the other end of the connecting rod, the tip of the self-tapping screw faces the direction away from the grab handle, and the nominal diameter of the self-tapping screw is larger than the inner diameter of the plastic expansion nail. The hardness of the self-tapping screw is larger than that of the plastic expansion screw, a flange is arranged at the joint of the connecting rod and the self-tapping screw, and the radial section size of the flange is larger than that of the outer end face of the plastic expansion screw. The tool is nested with the inner hole of the plastic expansion nail to pull out the expansion nail, so that the damage to the peripheral structure of the expansion nail mounting hole in the pull-out process can be effectively avoid