Abstract: The present invention relates to the technical field of automation equipment, in particular to an automatic locking/unlocking device. The invention aims to solve the problem of large assembly error and low work efficiency of semi-automatic locking/unlocking methods. The automatic locking/unlocking device of the present invention comprises a control part and a locking/unlocking mechanism, wherein the control part can bring the locking/unlocking mechanism to a mating position corresponding to a target position; and the control part enables a fastener to achieve a target state by controlling the movement of the locking/unlocking mechanism. By means of the control part controlling the movement of the locking/unlocking mechanism so as to achieve the target state of the fastener, the assembly precision of the fastener is improved, and an auto-controlled mounting of the fastener is realized.