The invention discloses a flexible misjudgment preventing butt joint rod with signal feedback. The butt joint rod comprises an outer rod, an inner rod, a Hall proximity switch, a spherical head, an electromagnet switch, a mounting rack and an adapter. During butt joint, the flexible rod can generate appropriate flexible deformation under the auxiliary effect of a passive part guide cone of a butt joint mechanism, so that the flexible rod can be well adapted to the process of butt joint, and the influence generated by the position deviation of two spacecrafts on the process of butt joint during butt joint is reduced. The butt joint rod adopts a rod-in-rod structure; before the butt joint rod is locked, the outer rod and the inner rod can generate appropriate deformation so as to reduce the influence of position deviation; when the butt joint rod is locked, the inner rod can make relative motion along an axis with the outer rod, namely the inner rod can stretch out along the axis, so that a locking state is relieved. The Hall proximity switch is arranged at the top end of the flexible rod; during butt joint, only when the butt joint is finished, and the relative distance of the Hall proximity switch and a magnetic cylinder (passive part) is smaller than 10mm, feedback signals can be generated, so that the locking misjudgment is avoided, and the passive end is guaranteed to be passive.