This paper describes the application of a modified digital surgical guide, an occlusal template and a pre-formed reconstruction titanium plate in the open reduction and internal fixation of a bilateral mandibular fracture. Bilateral mandibular fracture is a commonly encountered simple type of fracture. However, even for an experience surgeon, achieving precise treatment remains a challenge due to the movable temporomandibular joint, unstable fractured segments, the difficulty in forming a reconstruction plate, and the lack of an effective stabilizing and locating device. In this case, the surgeon used a specially-designed modified guide together with a reconstruction plate and an occlusal template to treat a bilateral mandible fracture, effectively improving the accuracy and the medical outcome of the operation, saving operation time and reducing postoperative complications.