The utility model discloses an inserted lift scaffold's uninstallation device aims at providing the inserted lift scaffold's uninstallation device that the security is high. It includes the bottom plate, and set up on the bottom plate and the upper end sets up the supporting seat of vertical blind hole, vertical threaded rod of pegging graft in the supporting seat blind hole, and at least one twists the nut on the threaded rod, the fixed setting in the clamping part of threaded rod upper end soon to and the backup pad of two parallel arrangement on nut symmetry clamping face, one side of bottom plate is provided with downwardly extending's baffle, the supporting seat is close to baffle one side, and the bottom of blind hole be concave spherical, and the lower extreme of threaded rod is the hemisphere, and the threaded rod is located the annular groove that is provided with spacing usefulness in the pole portion of blind hole, sets up the spacing bolt that is used for restricting the vertical removal of threaded rod to the extension of annular groove direction on the supporting seat, one side of backup pad is provided with first supporting part, and the opposite side is provided with the second supporting part, and first supporting part and second supporting part have certain difference in height.