The invention provides a connecting element. The connecting element comprises a barrel body two ends of which are provided with openings, wherein the barrel body is provided with an inner thread; the inner thread comprises a first thread section connected with a first workpiece with an outer thread, and a second thread section connected with a second workpiece with an outer thread. The connecting element provided by the invention has the advantages that the operation is easy and rapid, the manufacturing cost is relatively low, additional external force applying on the workpiece can not be caused, the workpiece is not easy to damage, and the connecting quality and the effect are high.