The skull is the head skeleton of humans and other vertebrates and is located above the spinal column. Under normal circumstances, there are 23 human cranial bones, which can be divided into two parts: the cerebral cranium and the facial cranium, of which the cerebral cranium can be divided into the skull base and skull cap bones, consisting of a total of 8 bones, while the facial cranium is composed of 15 bones. Skull: 1, skull cap bone: including 2 pieces of parietal bone, 2 pieces of temporal bone, 1 piece of occipital bone and 1 piece of frontal bone, by sagittal suture, squamous suture and coronal suture, “human” suture, connect these 6 pieces of bone with other tissues; 2, skull base bone: including 1 piece of sieve bone and 1 piece of butterfly bone, because of the inner surface of the skull base, the height is different, by virtue of the rock bone ridge, butterfly bone ridge as the boundary, it is divided into three parts, which are the anterior cranial fossa, the middle cranial fossa and the posterior cranial fossa. Second, the facial skull: it includes 2 maxillae, 2 nasal bones, 2 tear bones, 2 zygomatic bones, 2 palatine bones, 2 inferior turbinate bones, 1 plow bone, 1 mandible, and 1 movable hyoid bone. The maxilla and mandible are the largest, and the zygomatic bones are located on both sides of the face and are connected to the frontal and maxillary bones, and the temporal bone. The lacrimal bone is located in the orbit, the inferior turbinate is thin and located on the nasal surface of the maxilla, and the nasal bone is located on the anterior medial side of the frontal process of the maxilla. Located posterior to the nasal surface of the maxilla is the palatine bone, while the plastron is located posteriorly and inferiorly to the nasal septum. The hyoid bone resembles a horse’s hoof and is located in the lower posterior part of the mandibular body, which is connected to the neck by ligaments and other muscular tissues. The cerebral cranium and facial cranium together form the skull, and because the bones are harder, they are able to protect the nerves and muscles in the brain from damage. Injuries to the head should be avoided in life to prevent damage to the skull, resulting in skull defects or skull fractures.