Methods: 1. A small incision was made medial to the patient’s affected ear screen, from which all the condylar fragments were carefully removed, and then the condylar fracture ends were polished using an ultrasonic bone knife to prevent the sharp fracture ends from piercing the soft and hard tissues. 2, CT scan is performed on the patient to determine the structure of the articular fossa position and the height of the mandibular ascending branch under CT navigation. 3. A small incision was made under the affected side of the jaw, and a titanium condyle and attached titanium plate of matching size were selected and inserted through the incision, and the metal condyle was placed in the correct position in the articular fossa under CT navigation. Results: 1, The metal condyle was anatomically positioned in the articular fossa and the joint motion function was good. 2, The height of the mandibular ascending branch was well maintained. 3, A small incision made medial to the ear screen during surgery was basically invisible after surgery, leaving only an inconspicuous incision under the jaw, which protected the patient’s facial shape. 4. The condylar position and occlusal relationship were found to be good after 10 years of follow-up. The artificial condylar replacement by digital navigation technology can repair the occlusal function of the patient’s joint and protect the patient’s facial shape to the maximum extent, which has achieved good results.