The diagnostic criteria for craniocerebral injury include medical history, vital signs, and relevant examinations (e.g., x-ray plain film of the brain, CT of the brain, MRI of the brain, etc.). 1. Medical history: craniocerebral injury mainly has the history of traumatic brain injury or other brain diseases. 2. Vital signs: observe the patient’s current vital signs, including general signs, such as blood pressure, heart rate, respiration, temperature, etc.; state of consciousness; eye signs, such as whether the pupils are of the same size, whether there is hemorrhage in the fundus of the eye; limb activity, whether there is muscle twitching, etc.; it is also necessary to check whether there is trauma to the head or whether there is leakage of cerebrospinal fluid. 3. Relevant examination: after the occurrence of craniocerebral injury, it can be examined by X-ray film of the brain, CT of the brain, and MRI of the brain, etc. (1) Among them, it can be examined by X-ray film, CT of the brain, and MRI of the brain. (1) X-ray film can be used to check whether there is skull fracture, separation of cranial sutures, and intracranial pneumoconiosis. (2) CT of the brain can check the specific location and extent of the injury, the size of the hematoma location, the location of cerebral edema, fracture, cerebral contusion, and the extent of brainstem damage. (3) MRI of the brain can further check the isodense subdural hematoma, small cerebral contusion, focal hemorrhage, posterior cranial fossa lesion, and small foci at the base of the skull and the roof of the skull, which can be displayed more clearly than CT. After the occurrence of craniocerebral injury, it is necessary to go to the hospital in time for treatment, so as to avoid the condition from aggravating and affecting the health of the body.