A mounting device for directly bonding brackets to the tooth surface includes a tray and a mounting rack. Each mounting rack is used for mounting a bracket, and the mounting rack includes a support and a positioning clamp. The tray is used as the support base for installing the mounting rack. The support is used as the fixed supporting part, with one end connected and fixed to the lingual or lip side of the tray. The positioning clamp is used as the rotating part to connect with the bracket and adjust the position of the bracket. The positioning clamp includes a damping rotation shaft, the damping rotation shaft matches with the support, the positioning clamp rotates around the support through the damping rotation shaft, and the support and the tray adopt an integrally formed structure or detachable structure.
