A self-locking bracket with a sliding cover, comprises a bottom bracket (11) and a base (12), the base (12) connects the labial surface of the bottom bracket (11), the top downwards to form a groove (13), wherein one part, which is positioned on one side of the groove (13), of the base (12) serves as a first base (14), and the other part, which is positioned on the other side of the groove (13), of the base (12) serves as a second base (15) also includes the sliding cover (2), the upper part of the first base (14) is provided with a first slideway (16) the upper part of the second base (15) is provided with a second slideway (17) the first slideway (16) and the second slideway (17) form a channel in which the sliding cover (2) slides the sliding cover (2) comprises one end (21) in the first slideway (16) and the other end (22) which can enter the second slideway (17) a limited slot (26) is arranged in the middle part of the sliding cover (2) along the sliding direction and one end of a banking pin (18) penetrates through the limited slot (26), and the other end of the banking pin (18) is arranged on the inner wall of the first slideway (16). As the channel jointly formed by the first slideway and the second slideway limits the upper, lower, left and right movement range of the sliding cover, and the limited slot and the banking pin are cooperated with each other to limit the front and back movement range of the sliding cover, the movement of the sliding cover is effectively limited in six directions and can not accidentally fall off when moving and being worn, thereby effectively ensuring the stability and effectivity of orthodontic operation.Linvention concerne un support à verrouillage automatique ayant un couvercle coulissant, qui comprend un support inférieur (11) et une base (12), la base (12) est reliée à la surface labiale du support inférieur (11), la partie supérieure est orientée vers le bas pour former une rainure (13), une partie, qui est positionnée sur
