Structure for pulling out bolt without top

The utility model discloses a structure for pulling out a bolt without a top. The structure comprises a bolt without a top, which is in threaded connection with a connecting piece, wherein the bolt without the top is provided with a thread hole having the same central line as the bolt without the top, the thread hole is in threaded connection with a small bolt, and a direction of turning of a screw thread of the thread hole is opposite to a direction of turning of a screw thread of the bolt without the top. By adopting the technical scheme, the small bolt is clamped by a wrench so as to be screwed into the thread hole, the direction of turning of the screw thread of the thread hole is opposite to the direction of turning of the screw thread of the bolt without the top, so that the bolt without the top is driven to be unscrewed in a screwing process of the small bolt, thus the bolt without the top is dismounted from the connecting piece. The structure, provided by the utility model, has the advantages of easiness in mastering in application, convenience and fastness, and capability of preventing the connecting piece from deformation and damage due to external damage.