The computer assisted navigation system (CANS) combines spatial three-dimensional navigation technology, computer image processing and visualization technology with clinical surgery, so that the position of surgical instruments can be displayed in real time, and the physician can understand the position of surgical instruments and the relationship with the patient’s anatomy at any time, avoiding important anatomical structures and ensuring The surgeon can avoid important anatomical structures and ensure the safety of surgery. Because of its advantages, CANS technology is increasingly used in oral and maxillofacial surgery, such as foreign body removal, tumor removal, deformity repair, facial reconstruction and implant placement. Navigation systems were first used in neurosurgery in the late 1980s, and then gradually spread to other surgical fields. In oral and maxillofacial surgery, computer-aided surgery is increasingly developed and gradually applied in diagnosis, preoperative design simulation and treatment due to the high accuracy, functional and cosmetic requirements. Computer navigation systems are widely used in maxillofacial trauma. In traditional surgery, the repositioning of maxillofacial fractures depends mainly on the clinical experience of the operator, which limits the accuracy of alignment and the functional recovery after surgery. For example, fractures in the orbital region are difficult to be accurately repositioned by the operator’s experience alone due to the delicate and complex anatomical structure. The use of navigation systems for orbital fractures has significantly improved this situation. It ensures complete anatomical repositioning of the fracture, restoring form and function with simple and effective results. The navigation system has obvious advantages: it extends the limited visual range of the surgeon, breaks through the boundaries of traditional surgery, updates the concept of surgery and surgical instruments, and is of great importance in improving the accuracy of surgical positioning, reducing surgical injuries and postoperative complications, optimizing the surgical path, shortening surgical time, and increasing the success rate of surgery. The team led by Director Zhang Hai Zhong has achieved fruitful results and accumulated rich clinical experience in the application of computer navigation system in many fields of oral and maxillofacial surgery, especially in the treatment of complex fractures, old fractures, developmental deformities of the jaws, foreign body removal from the jaws and neck, and malignant tumors of the head and neck, and its technology and experience have been exchanged in academic conferences at home and abroad for many times. His techniques and experiences have been exchanged in many academic conferences at home and abroad, and have been praised by experts and scholars at home and abroad.