A self-locking bearing groove with an elastic-ring locking buckle (3) on a working wing (2), which comprises a bearing groove bottom plate (1) and the working wing (2) arranged on a buccal labial surface of the bearing groove bottom plate (1). The working wing (2) comprises a base connected with the bearing groove bottom plate (1), the middle part of the base is recessed to form slots (21), and all the slots (21) are arranged on the axis of one slot. The base is divided into a first base (22) and a second base (23) by the axis of the slot. The elastic-ring locking buckle (3) is provided on the top of the first base (22), and comprises a spring piece (32) and a free end (33). One end of the spring piece (32) is fixed with the first base (22), and the other end of the spring piece (32) is connected with the free end (33). The spring piece (32) is a bending piece with elasticity, and the free end (33) is suspended above the buccal labial surface of the working wing (2). A clamping piece (35) and a blocking piece (36) which extend from different directions are arranged on the free end (33). When the spring piece (32) is in a loose state, the clamping piece (35), the blocking piece (36) and the slots (21) together form an arch wire groove. The clamping piece (35) and the blocking piece (36) move simultaneously and synchronously, so that the functions of closing an arch wire outlet/inlet port (4) and restricting an arch wire in the arch wire groove are both realized.La présente invention concerne un sillon de support autobloquant à boucle de verrouillage (3) à anneau élastique, disposé sur une aile de travail (2), xqui comprend une plaque inférieure de sillon de support (1) et laile de travail (2) agencée sur une surface bucco-labiale de la plaque inférieure de sillon de support (1). Laile de travail (2) comprend une base reliée à la plaque inférieure de sillon de support (1), la partie médiane de la base étant évidée de sorte à former des fentes (21), et lensemble des fe
