The invention relates to an appliance for being implanted into a sternoclavicular hook bone plate, which is used for treating anterior and posterior dislocation of a sternoclavicular joint or the anterior and posterior dislocation associated with proximal fracture of clavicle. The appliance comprises a drilling guide device for drilling positioning on a presternum, a thread drawing guide device for threading on the presternum after drilling and a guide rotary tool, wherein the drilling guide device comprises a handle 1, a guide sleeve and a clamping sleeve 1, the clamping sleeve 1 is in the shape of C, the guide sleeve is fixed on an upper plate of the clamping sleeve 1, and a positioning groove is arranged on the inner side of a lower plate of the clamping sleeve 1; the thread drawing guide device comprises a handle 2 and a clamping sleeve 2, the clamping sleeve 2 is in the shape of C, a circular hole with an open slot is arranged on the upper plate of the clamping sleeve 2, and a screw is arranged on the inner side of the clamping sleeve 2; and the guide rotary tool comprises a cross nut, a rotary tool rod, a thread and a ball, a rotary tool handle is arranged at the tail part of the rotary tool rod, the thread penetrates a through hole on the rotary tool rod, one end of the thread is connected with the cross nut, and the other end of the thread is connected with the ball. The appliance has the characteristics of small iatrogenic injuries, short operation time and safety, and can reduce the suffering of a patient.