To investigate the relationship between the change of blood glucose and creatinine and the prognosis of patients with craniocerebral trauma, and to provide theoretical basis for guiding clinical prognosis. Methods 71 cases of patients with craniocerebral trauma from October 2014 to October 2015 were divided into mild group, moderate group and severe group according to the score of disease (Glasgow Coma Scale, GCS). The changes of blood glucose and creatinine were observed in each group at different time points. Results The levels of blood glucose and creatinine in the patients with severe traumatic brain injury were significantly higher than those in the light and medium groups (p <0.05). In the light group, blood glucose and creatinine returned to normal level 30 days after injury. The duration of blood glucose in medium and heavy group was longer than that in normal group. The level of creatinine in medium group was higher than that in normal group. Indicating that the lower the GCS score of craniocerebral injury, the higher the blood glucose, creatinine value, the longer the duration. Conclusion The monitoring of blood glucose and creatinine levels in patients with traumatic brain injury is of great significance in assessing prognosis and ly taking treatment measures to improve the success rate of treatment.