A wire locking structure includes a base, at least one conductive terminal lug and at least one screw. The base has at least one hole and at least one through-hole which communicate with each other and communicate with the outside of the base. The at least one conductive terminal lug is disposed at the at least one hole, includes a locking portion and a terminal portion, and has an aperture. The locking portion has an internal thread. The terminal portion extends from the at least one hole to the outside of the base. The aperture communicates with the at least one through-hole and opens to the internal thread. The at least one screw penetrates the at least one hole so as to be engaged with the internal thread and screwed into the aperture. The wire locking structure saves materials, cuts costs, and enhances the wire locking conforming rate.