The orthodontic bracket comprises a bracket body and a lock cover, one side of the bracket body is provided with a bottom plate for bonding a dental surface, the other side of the bracket body is provided with an arch wire groove, one side of the bracket body provided with the arch wire groove is provided with a sliding groove, the lock cover is installed on the bracket body in a sliding mode through the sliding groove, and the orthodontic bracket further comprises a plurality of elastic columns, a sliding groove and a plurality of locking blocks, the elastic columns are arranged at intervals in the direction perpendicular to the sliding direction of the lock cover, and one ends of the elastic columns are installed in the sliding grooves in a sliding mode. The locking blocks are installed in the sliding grooves, the multiple locking blocks are arranged on the sliding paths of the elastic columns correspondingly, and the two sides, on the sliding paths of the elastic columns, of the locking blocks are each provided with a guide face; one end, far away from the sliding groove, of the elastic column is connected to the lock cover; the sliding groove is formed in the bracket body and located at the bottom of the sliding groove; or one end, far away from the sliding groove, of the elastic column is connected to the bracket body at the bottom of the sliding groove, and the sliding groove is formed in one side, facing the bottom of the sliding groove, of the lock cover. The application has the effect of improving the locking stability of the lock cover.