Different types of skull fractures have different degrees of severity. According to the fracture morphology, they can be categorized into skull cap bone fracture and skull base fracture. 1. Cranial skull fracture: according to the fracture morphology, it is divided into linear fracture, depressed fracture, and comminuted fracture. Comminuted fracture is mostly in the shape of depression, and it is included in depressed fracture. When the bone fragments of depressed fracture are plunged into the skull, the local brain tissues underneath it are compressed or produce contusion and intracranial hematoma. Clinically, neurologic dysfunction, intracranial hypertension, and epilepsy may occur in the corresponding lesion. If the depressed fracture fragment punctures the punctured venous sinus, it can cause fatal hemorrhage, which is more serious. 2. Skull base fractures: including anterior cranial fossa fracture, middle cranial fossa fracture and posterior cranial fossa fracture. (1) Fractures of the anterior cranial fossa: can lead to cerebrospinal fluid leakage, olfactory nerve damage and subglottic bruising. (2) Fractures of the middle cranial fossa: they may involve the 2nd to 6th pairs of cerebral nerves and produce symptoms of corresponding neurological dysfunction. (3) Posterior cranial fossa fracture: the 9th to 12th pairs of cerebral nerves can be injured, resulting in corresponding neurological dysfunction. Fractures of the base of the skull that damage nerves seriously affect the quality of life and are often accompanied by other violent injuries, all types of fractures should be actively sought medical treatment.